Once again, UAE is the happiest country in the Arab world!

The UAE is the happiest country in the Arab world and ranks 20th among 156 countries measured in this year's World Happiness Report.

The report was released on Wednesday ahead of the UN's International Day of Happiness and saw the UAE inch up one position from 21st place in 2017.

Finland topped the list with fellow Scandinavian countries Norway (the former world number one), Denmark and Iceland making up the top four.

Saudi Arabia was ranked at 33. Bahrain and Kuwait ranked 43 and 45 respectively. Meanwhile, the US dropped four spots from 2017 to rank 18th happiest country this year.

The bottom three in the list were Burundi, Central African Republic and South Sudan – all countries that have struggled with conflict and instability.

In Western Europe, most countries have immigrants at between 10 and 15 per cent of the population. The same is true of the US; while Canada, Australia and New Zealand have between 20 and 30 per cent. The most extreme cases are the UAE and Kuwait, both with populations comprising more than 70 per cent of immigrants.