According to World Happiness Report 2018, what is the happiest country in the world?

The 2018 iteration was released on 20 March and focused on the relation between happiness and migration. As per 2019 Happiness Report, Finland is the happiest country in the world, with Denmark, Norway, Iceland, and the Netherlands holding the next top positions. The World Happiness Report 2018 ranks 156 countries by their happiness levels, and 117 countries by the happiness of their immigrants. The main focus of this year's report, in addition to its usual ranking of the levels and changes in happiness around the world, is on migration within and between countries.Four countries have held the top spot in the last four reports: Denmark, Switzerland, Norway and now Finland. All the top countries tend to have high values for all six of the key variables that have been found to support well-being: income, healthy life expectancy, social support, freedom, trust and generosity. Among the top countries, differences are small enough that year-to-year changes in the rankings are to be expected.