The data is based on the agency's earlier survey held last year on 38,600 people over 13 years old.

The percentage has been on a rise for years, with the figure having stood at 36.7 percent in 2010.

The latest findings also showed that 32.9 percent of people between 50 to 69 held similar views on marriage, up from 29.7 percent in 2014.

Those who are in favor of marriage last year accounted for 38.8 percent of all people polled, down from 48.1 percent in 2014.

Moreover, 61.7 percent of South Korean youths said that a couple can live together without formally tying the knot, although only 34.5 percent of their parents had the same view.

The latest survey results reflect the country's low birthrate and late marriage trend, the statistical office said.

As more and more women work and pursue their careers, people are getting married and having children at older ages, or giving up on finding a spouse and having babies.

The country's fertility rate, or the average number of babies that a woman is projected to have during her lifetime, has hovered around 1.2 since it dropped to a record low of 1.08 in 2005.

The report also showed that the number of young people in the age group of 9-24 reached 9.25 million in 2017, accounting for a modest 18 percent of the country's total population of 51.45 million.

The youth population will keep decreasing further due to the low birthrate, while the entire population is forecast to contract from 2032 onward.

As a result, the percentage of young people, which peaked at 36.9 percent in 1978, will drop to 11.1 percent in 2060. (Yonhap)