The US has fallen out of the top 20 happiest countries to live in for the first time ever, according to a new report.

In findings released on Wednesday, the World Happiness Report revealed that the US has slid from its 15th place last year to 23rd place this year.

The report, created via a partnership involving Gallup, the Oxford Wellbeing Research Centre, the UN Sustainable Development Solutions Network, and the World Happiness Report’s editorial board, pointed to happiness decreasing in all age groups for the US. It also found a significant decline among young people, who are now the least happy age group.

“This is a big change from 2006-10, when the young were happier than those in the midlife groups, and about as happy as those aged 60 and over. For the young, the happiness drop was about three-quarters of a point, and greater for females than males,” the report said.

Among people below the age of 30 from 2021 to 2023, the US ranks 62nd in happiness. Meanwhile, among those who are 60 and above, the US ranks 10th.

“In comparing generations, those born before 1965 are, on average, happier than those born since 1980. Among millennials, evaluation of one’s own life drops with each year of age, while among boomers life satisfaction increases with age,” according to a summary of the report.

Finland, for the seventh straight year, has been ranked the world’s happiest country. It is followed by Denmark, Iceland, Sweden and Israel. The least happy country is Afghanistan, the report said, followed by Lebanon, Lesotho, Sierra Leone and the Democratic Republic of the Congo.

The report’s rankings are not based on any index of factors including GDP per capita, social support, healthy life expectancy, freedom, generosity and corruption. Instead, the scores are based on individuals’ own assessments of their lives, according to researchers.