The population of the Seoul Metropolitan region has decreased for the first time.

According to data on population mobility by Statistics Korea on Wednesday, two-point-39 million people moved into the Seoul metropolitan area in 2015 from five years before, while over two-point-five million people moved to other regions.

As a result, a net 163-thousand people moved out of the capital region over the cited period.

It is the first time the population of the capital region, which includes Gyeonggi Province and Incheon City, marked a net decrease since 1970, when the agency began compiling such data.

An official at the statistics agency said expensive housing and jobs drove more people to move to the neighboring regions of Chungcheong and Gangwon provinces.