South Korean school children were the least happy among those in OECD countries, a recent survey showed.

In the latest survey, the subjective happiness index of South Korean children was 60.3 percent, which was the lowest among the OECD countries.

Some of the major reasons behind the statistics include lack of leisure time and hobbies, as well as stress over academic obligations.

South Korea’s schoolchildren were found to be the unhappiest in the OECD in previous years, with 64.3 points in 2009, 65.1 in 2010 and 69.29 in 2012. 

Meanwhile, children in the Netherlands were the happiest with 94.2 percent, followed by those in Iceland and Finland, who scored 90.2 percent and 89.8 percent, respectively.