This map shows how terrorism has spiked across the world over the past year

The Military Structure of ISIS Explained

Terrorism increased by 80 percent in 2014 reaching the highest levels ever recorded, according to the Institute for Economics and Peace's annual Global Terrorism Index published on November 16th.

This sharp escalation in violence killed 32,658 people in 2014, compared to 18,111 in 2013, according to the Index.

The rise in terrorism can largely be attributed to two groups: ISIS; and Boko Haram, the Nigerian jihadist group that pledged allegiance to ISIS in March of 2015. Combined, these groups were responsible for 51% of all terrorism-related deaths in 2014.

Terrorism also has a disproportionate impact on a small number of countries. According to the index, five countries — Afghanistan, Iraq, Nigeria, Pakistan, and Syria — accounted for 78% of all terrorism-linked deaths.

This map from the Index shows the impact of terrorism on countries around the world:

global terrorism indexInstitute for Economics and PeaceBoko Haram was the single deadliest terrorist organization in 2014, according to the Index. The group was responsible for 7,512 deaths in Nigeria, an increase of 300% from 2013. Overall, Iraq had the highest number of terrorism-related deaths, with 9,929 people killed in the course of the year.

The Global Terrorism Index also noted that beyond the number of people killed, the general scope of terrorism also increased. Eleven countries suffered over 500 terrorism fatalities in 2014. In 2013, only five countries were affected by that volume of terrorism.

Despite the rise in terrorism globally, CNN notes that the Europe and the US have remained relatively free of terrorist incidents. If the September 11th attacks are excluded, only 0.5% of terrorism fatalities since 2000 have occurred in the West.

global terrorism indexInstitute for Economics and PeaceTerrorism in the US has largely been the work of "lone wolves," or attackers without a clear operational connection to a terrorist group. According to the Global Terrorism Index, lone wolf attacks accounted for 70% of all terrorism-linked deaths in the West over the past 10 years. Of those "lone wolves," 80% of attacks were motivated by "political extremists, nationalists, racial and religious supremacists," rather than by jihadists.

Related: See Muslims in India protesting the recent terrorist attacks in Paris:

NTP: Indians, Indian Muslims protest Paris attacks and ISIS
See Gallery
This map shows how terrorism has spiked across the world over the past year
KOLKATA, INDIA - MOVEMBER 18: Students from different colleges and schools organized a candle march as they protest against Friday's Paris massacre by Islamic State of Iraq and Syria (ISIS) from Jodhpur Park to Alipore, on November 18, 2015 in Kolkata, India. At least 129 people lost their life in terror attacks by terrorists in Paris at the packed Bataclan concert hall, restaurants and bars, and outside the Stade de France national stadium. Islamist jihadist group IS, that has seized control of large parts of Syria and Iraq, claimed responsibility for the attacks. (Photo by Samir Jana/Hindustan Times via Getty Images)
BHOPAL, INDIA - NOVEMBER 18: Scores of Muslims including Ulema-e-Hind, one of the leading Islamic organisations in India, staged a protest against terrorism and attacks by 'extremist outfits' and condemn the terror strikes in Paris and other countries like Turkey and Lebanon in the name of Islam, at Iqbal Maidan on November 18, 2015 in Bhopal, India. The Jamiat-e-Ulama organised the event, which gave a call for universal peace. (Photo by Praveen Bajpai/Hindustan Times via Getty Images)

More from Business Insider:
This map shows how terrorism has spiked across the world over the past year
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