Many US police officers say their jobs have gotten harder

Many police officers in the U.S. say their jobs have gotten more difficult.

And they say recent high-profile shootings by and against officers are largely why.

According to new numbers from the Pew Research Center, 86 percent of the nearly 8,000 officers surveyed said fatal encounters between police and black Americans have made their jobs tougher.

And 3 in 4 officers said they're now more hesitant to use force when it's appropriate because of the attention those incidents tend to get.

The report's lead author told the Los Angeles Times, "The fact that these incidents have brought so much attention to their job has actually made it harder to execute in certain circumstances."

See protests after high-profile officer-involved shootings:

20 PHOTOS
Protests around country over Alton Sterling, Philando Castile shootings
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Protests around country over Alton Sterling, Philando Castile shootings
ST. PAUL, MN - JULY 09: Protestors yell at police from a bridge on July 9, 2016 in St. Paul, Minnesota. A protest shut down highway I-94 during a march to commemorate Philando Castile who was killed by police on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: Police officers launch smoke bombs and tear gas to clear out protestors who shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: Police officers line up to clear out protestors who shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: Police officers launch smoke bombs and tear gas to clear out protestors who shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
BATON ROUGE, LA -JULY 09: Protesters lock arms and shout at law enforcement in riot gear on July 9, 2016 in Baton Rouge, Louisiana. Alton Sterling was shot by a police officer in front of the Triple S Food Mart in Baton Rouge on July 5th, leading the Department of Justice to open a civil rights investigation. (Photo by Mark Wallheiser/Getty Images)
ST. PAUL, MN - JULY 09: Protestors shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
BATON ROUGE, LA -JULY 09: Baton Rouge police removed protesters that were arrested on July 9, 2016 in Baton Rouge, Louisiana. Alton Sterling was shot by a police officer in front of the Triple S Food Mart in Baton Rouge on July 5th, leading the Department of Justice to open a civil rights investigation. (Photo by Mark Wallheiser/Getty Images)
ST. PAUL, MN - JULY 09: A protestor is held back by another man on shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have happened every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: Protestors shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Ph22oto by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: A protestor raises his fist on shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: Police line up as protestors shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: A police officer gives commands as protestors shut down highway I-94 on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 09: Protestors raise their hands as police attempt to move them off highway I-94 which they shut down on July 9, 2016 in St. Paul, Minnesota. Protests and marches have occurred every day since the police killing of Philando Castile on June 6, 2016 in Falcon Heights, Minnesota. (Photo by Stephen Maturen/Getty Images)
Protestors shout slogans during a protest in Times Square in support of the Black lives matter movement in New York on July 09, 2016. The gunman behind a sniper-style attack in Dallas was an Army veteran and loner driven to exact revenge on white officers after the recent deaths of two black men at the hands of police, authorities have said. Micah Johnson, 25, had no criminal history, Dallas police said in a statement. / AFP / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
Police officers stand guard during a protest in Times Square in support of the Black lives matter movement in New York on July 09, 2016. The gunman behind a sniper-style attack in Dallas was an Army veteran and loner driven to exact revenge on white officers after the recent deaths of two black men at the hands of police, authorities have said. Micah Johnson, 25, had no criminal history, Dallas police said in a statement. / AFP / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
Police officers stand guard during a protest in Times Square in support of the Black lives matter movement in New York on July 09, 2016. The gunman behind a sniper-style attack in Dallas was an Army veteran and loner driven to exact revenge on white officers after the recent deaths of two black men at the hands of police, authorities have said. Micah Johnson, 25, had no criminal history, Dallas police said in a statement. / AFP / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
People shout slogans during a protest in support of the Black lives matter movement in New York on July 09, 2016. The gunman behind a sniper-style attack in Dallas was an Army veteran and loner driven to exact revenge on white officers after the recent deaths of two black men at the hands of police, authorities have said. Micah Johnson, 25, had no criminal history, Dallas police said in a statement. / AFP / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
A protestor shouts slogans during a protest in support of the Black lives matter movement in New York on July 09, 2016. The gunman behind a sniper-style attack in Dallas was an Army veteran and loner driven to exact revenge on white officers after the recent deaths of two black men at the hands of police, authorities have said. Micah Johnson, 25, had no criminal history, Dallas police said in a statement. / AFP / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
People gather in Union Square during a protest in support of the Black lives matter movement in New York on July 09, 2016. The gunman behind a sniper-style attack in Dallas was an Army veteran and loner driven to exact revenge on white officers after the recent deaths of two black men at the hands of police, authorities have said. Micah Johnson, 25, had no criminal history, Dallas police said in a statement. / AFP / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
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SEE MORE: Chicago Police Assault Revives 'Ferguson Effect' Theory

As the number of attacks against police officers continues to grow, more than 90 percent of respondents said their colleagues worry more about their personal safety.

The Pew survey comes after a particularly violent year for law enforcement in the U.S.

According to data compiled by The Washington Post, more than 960 people were shot and killed by police in 2016.

And the National Law Enforcement Officers Memorial says over 130 police officers were killed in the line of duty last year — the highest number in five years, according to its count.

See more protest photos:

25 PHOTOS
Protests in response to mistrial in Freddie Gray case
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Protests in response to mistrial in Freddie Gray case
BALTIMORE, MD - DECEMBER 16: Protesters march through the streets after a mistrial was declared in the trial of Baltimore police Officer William G. Porter, December 16, 2015 in Baltimore, Maryland. The judge declared a mistrial on the third day of deliberations in Porter's trial, which is the first of six trials of police officers involved in the death of Freddie Gray. (Photo by Rob Carr/Getty Images)
BALTIMORE, MD - DECEMBER 16: Protesters confront Baltimore City Police officers as they march through the streets after a mistrial was declared in the trial of Baltimore police Officer William G. Porter, December 16, 2015 in Baltimore, Maryland. The judge declared a mistrial on the third day of deliberations in Porter's trial, which is the first of six trials of police officers involved in the death of Freddie Gray. (Photo by Rob Carr/Getty Images)
A protester speaks to policeman in reaction to a mistrial declared in the trial of police officer William Porter in Baltimore, Maryland on December 16, 2015. The manslaughter trial of a Baltimore policeman accused over the death in custody of African-American Freddie Gray was declared a mistrial after the jury failed to reach a verdict, putting the city on edge. Police were out in force in parts of the gritty East Coast city in a bid to avoid a repeat of the riots and looting that erupted after the death in April of the 25-year-old Gray, the latest in a series of high-profile cases of perceived police brutality in the United States. AFP PHOTO/MOLLY RILEY / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
Protesters march in Baltimore after the announcement of a hung jury in the trial of Officer William Porter in the Freddie Gray case, on Wednesday, Dec. 16, 2015. (Lloyd Fox/Baltimore Sun/TNS via Getty Images)
BALTIMORE, MD - DECEMBER 16: Protesters gather at the site of last Aprils riots after todays mistrial in the trial of Baltimore police Officer William G. Porter, December 16, 2015 in Baltimore, Maryland. The judge declared a mistrial on third day of deliberations in PorterÃs trial, which is the first of six trials of police officers involved in the death of Freddie Gray.Ã (Photo by Mark Wilson/Getty Images)
BALTIMORE, MD - DECEMBER 16: A protester holds a sign at the site of last Aprils riots after todays mistrial in the trial of Baltimore police Officer William G. Porter, December 16, 2015 in Baltimore, Maryland. The judge declared a mistrial on third day of deliberations in PorterÃs trial, which is the first of six trials of police officers involved in the death of Freddie Gray.Ã (Photo by Mark Wilson/Getty Images)
BALTIMORE, MD - DECEMBER 16: Police stand guard as protesters march through the streets hours after a mistrial was declared in the trial of Baltimore police Officer William G. Porter, December 16, 2015 in Baltimore, Maryland. The judge declared a mistrial on the third day of deliberations in Porter's trial, which is the first of six trials of police officers involved in the death of Freddie Gray. (Photo by Mark Wilson/Getty Images)
BALTIMORE, MD - DECEMBER 16: Protesters march through the streets hours after a mistrial was declared in the trial of Baltimore police Officer William G. Porter, December 16, 2015 in Baltimore, Maryland. The judge declared a mistrial on third day of deliberations in Porter's trial, which is the first of six trials of police officers involved in the death of Freddie Gray. (Photo by Mark Wilson/Getty Images)
Protesters march in Baltimore after the announcement of a hung jury in the trial of Officer William Porter in the Freddie Gray case, on Wednesday, Dec. 16, 2015. (Lloyd Fox/Baltimore Sun/TNS via Getty Images)
BALTIMORE MD- DECEMBER 16: Law enforcement warns the displeased protesters that they are breaking the law as they react to the mistrial declared in the Freddie Gray Case at the Baltimore City Circuit County Court for Baltimore officer William G. Porter accused of involuntary manslaughter in Baltimore, Maryland on December 16, 2015. (Photo by Marvin Joseph/The Washington Post via Getty Images)
Mayor Stephanie Rawlings Blake, left, and Police Commissioner Kevin Davis, right, during a news conference at police headquarters with other city officials to discuss plans for dealing with the reaction to the announcement of a hung jury in the trial of Officer William Porter, on Wednesday, Dec. 16, 2015. (Amy Davis/Baltimore Sun/TNS via Getty Images)
Protesters march around City Hall in Baltimore after the announcement of a hung jury in the trial of Officer William Porter in the Freddie Gray case, on Wednesday, Dec. 16, 2015. (Lloyd Fox/Baltimore Sun/TNS via Getty Images)
Police stand outside the Baltimore City Circuit Courthouse after the hung-jury was announced in the trial of Police Officer William Porter, in Baltimore, Maryland on December 16, 2015. The manslaughter trial of a Baltimore policeman accused over the death in custody of African-American Freddie Gray was declared a mistrial after the jury failed to a reach a verdict, putting the city on edge. AFP PHOTO/ MOLLY RILEY / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
BALTIMORE, MD - DECEMBER 16: A protester yells at members of the Baltimore City Sheriffs Department in front of the Baltimore City City Circuit Courthouse East, after a mistrial was declared in the trial of Baltimore police Officer William G. Porter, December 16, 2015 in Baltimore, Maryland. The judge declared a mistrial on third day of deliberations in Porter's trial, which is the first of six trials of police officers involved in the death of Freddie Gray. (Photo by Rob Carr/Getty Images)
One protestor tries to calm another after officers from the Baltimore Sheriff's Department arrested a protestor across the street from Courthouse East following the announcement of a hung jury in the trial of Officer William Porter, on Wednesday, Dec. 16, 2015. (Kenneth K. Lam/Baltimore Sun/TNS via Getty Images)
Officers from the Baltimore Sheriff's Department try to secure the area as they arrest a protestor across the street from Courthouse East after the announcement of a hung jury in the trial of Officer William Porter in the Freddie Gray case, on Wednesday, Dec. 16, 2015. (Kenneth K. Lam/Baltimore Sun/TNS via Getty Images)
A demonstrator holds a sign during the trial of Police Officer William Porter at Baltimore City Circuit Courthouse, December 16, 2015 in Baltimore, Maryland. AFP PHOTO/MOLLY RILEY / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
Protesters react outside Baltimore City Circuit Courthouse after the hung-jury was announced in the trial of Police Officer William Porter, in Baltimore, Maryland on December 16, 2015. The manslaughter trial of a Baltimore policeman accused over the death in custody of African-American Freddie Gray was declared a mistrial after the jury failed to a reach a verdict, putting the city on edge. AFP PHOTO/ MOLLY RILEY / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
Officers from the Baltimore Sheriff's Department arrest a protestor across the street from Courthouse East after the announcement of a hung jury in the trial of Officer William Porter in the Freddie Gray case, on Wednesday, Dec. 16, 2015. (Kenneth K. Lam/Baltimore Sun/TNS via Getty Images)
A demonstrator holds a sign during the trial of Police Officer William Porter at Baltimore City Circuit Courthouse, December 16, 2015 in Baltimore, Maryland. AFP PHOTO/MOLLY RILEY / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
Police arrest a protester outside Baltimore City Circuit Courthouse after the hung-jury was announced in the trial of Police Officer William Porter, in Baltimore, Maryland on December 16, 2015. The manslaughter trial of a Baltimore policeman accused over the death in custody of African-American Freddie Gray was declared a mistrial after the jury failed to a reach a verdict, putting the city on edge. AFP PHOTO/ MOLLY RILEY / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
BALTIMORE, MD - DECEMBER 16: Protesters hold signs in front of the Baltimore City City Circuit Courthouse East, while a jury continues deliberations in Baltimore police Officer William G. Porter's trial, December 16, 2015 in Baltimore, Maryland. The jury is in its third day of deliberations in Porter's trial, which is the first of six trials of police officers involved in the death of Freddie Gray. (Photo by Mark Wilson/Getty Images)
Protesters march along Calver Street in Baltimore, outside the courthouse after the announcement of a hung jury in the trial of Officer William Porter in the Freddy Gray case, on Wednesday, Dec. 16, 2015. (Barbara Haddock Taylor/Baltimore Sun/TNS via Getty Images)
Police stand outside the Baltimore City Circuit Courthouse after the hung-jury was announced in the trial of Police Officer William Porter, in Baltimore, Maryland on December 16, 2015. The manslaughter trial of a Baltimore policeman accused over the death in custody of African-American Freddie Gray was declared a mistrial after the jury failed to a reach a verdict, putting the city on edge. AFP PHOTO/ MOLLY RILEY / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
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