This year's happiest place on Earth is Finland, according to an annual UN report - toppling Norway from the top spot

Nordic countries regularly appear in the top five, while war-hit countries and a number in sub-Saharan Africa regularly appear in the bottom five. Burundi was the least happy, taking over from the Central African Republic. The survey ranks some 156 countries by their happiness levels. Norway, Denmark, Iceland and Switzerland were the other countries in the top five. Britain and the United States came in at 19th and 18th places respectively. This year's biggest loser is Venezuela, which dropped 20 places to 102nd.