The World's 10 Happiest Countries: What They Have in Common

If leisure time is the 21st century's new barometer of wealth, it's no wonder Danes feel they're the most fortunate people on the planet. People in Denmark top out all other OECD nations in the amount of leisure time they have each day - a whopping 16.06 hours (including sleep) each day.

The rest of us time-poor souls subsist lower down the list, but Canadians feel themselves pretty fortunate as well (click on the photo below to see where we rank).

All of this data comes to us from the Organisation for Economic Co-operation and Development's annual Better Living Index, which measures life satisfaction based on more than 30 sets of data in 11 different categories, including education, health and employment. The study also asks residents of each country to rank, on a scale of 1 to 10, their general satisfaction with their lives. Financial website 24/7 Wall St. examined the 10 countries with the highest life satisfaction scores to find the strongest factors related to happiness. They found that economic prosperity, health and a strong social support network continue to correspond highly with happiness.

SLIDESHOW: CLICK ON PHOTO TO SEE WHO'S HAPPIEST

World's Happiest Developed Countries