The youth population in South Korea between nine and 24 years of age will decline by half over the next five decades due to low birth rate in the country, a new report released by the government reveals.
The number of young people peaked at 14 million in 1980, accounting for 36.8 percent of the whole population, census data by the Ministry of Gender Equality and Family showed on Monday.
Since then, it has steadily declined and stood at 10.2 million last year, or 20.4 percent.
The ministry said the current demographic trend would see that number fall to 9.6 million by 2015, 7.1 million by 2030, 5.9 million by 2050, and just 5.0 million by 2060.
After years of promoting family planning in a crowded nation of 50 million, South Korea has become increasingly alarmed by its rapidly ageing society.
A rising welfare bill and a declining working population is seen as one of the most serious challenges now facing Asia's fourth-largest economy.
By 2050, South Koreans aged 60 years or over will account for 39 percent of the population, up from 17 percent last year, according to the UN Department of Economic and Social Affairs.
South Korea's fertility rate -- the average number of children born to a woman over her lifetime -- stood at just 1.01 in 2011, compared to the Organisation for Economic Cooperation and Development (OECD) average of 1.71.