This year's happiest place on Earth is Finland, according to an annual UN report.
The World Happiness Report measures "subjective well‑being" ‑ how happy people feel they are, and why.
The report also uses statistics to explain why one country is happier than another.
It looks at factors including economic strength, social support, life expectancy, freedom of choice, generosity, and perceived corruption.
Burundi is the least happy, taking over from the Central African Republic.
This year's report by the UN Sustainable Development Solutions Network also features data about the happiness of immigrants in their host countries, with Finland also coming top as home to the happiest immigrants.
The top 10 happiest countries in the world are Finland, Denmark, Iceland, Switzerland, Netherlands, Canada, New Zealand, Sweden and Australia.
Source: BBC
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