Occupational medicine in Korea.

South Korea achieved very rapid economic development between the 1960s and 1990s, with a focus on manufacturing, during which time primary industry strikingly dwindled. Recently, Korea’s economy has begun to change from one that is manufacturing based to an economy that is essentially service based. In the last 20 years, small businesses have greatly increased in number and the proportions of working females and aged workers have increased to 49 and 27% of the total workforce, respectively.