Here are the world's happiest countries
For the second time in recent years, Colombia came out on top, with a whopping 87 percent of people describing themselves as being happy.
Once the 2 percent who reported being otherwise were factored in, the nation earned a net happiness score of 85 percent, roughly double the rate of the U.S.
SEE ALSO: The best cities to get out of debt
Fiji came in next, followed by Saudi Arabia, Azerbaijan and Vietnam. Among the 68 nations polled, Iraq came in last.
See the happiest countries below:
The 66,040 people polled were also asked about their feelings on the future of economic matters. Nigeria emerged as the most optimistic nation, with Bangladesh, China and Vietnam following just behind.
The citizens of Greece expressed the least hope for a bright financial future.
The WIN/Gallup poll was conducted between September and December of 2015.
People were interviewed by phone, in person, and online, and each nation was represented by approximately 1,000 respondents.
More from AOL.com:
New York director paints atmospheric portrait of city in poignant video
Getting your coffee fix might be harder in 3 years
The suitcase of the future will follow you around like a puppy