An analysis of the changes in the proportion of employees and establishments by industries reveals that the economic sectors of agriculture, forestry, fishing, mining, and manufacturing have declined continuously, while service sectors have increased. For example, the proportion of mining and manufacturing employees declined from 20.4% in 2000 to 16.4% in 2019. On the other hand, the proportion of service industrial sector employees and their establishments grew from 68.9% in 2000 to 78.5% in 2019. In particular, since 2000, the greatest increases in the number of service sector employees per thousands of persons have mostly occurred in the large metropolitan areas where the service sector grew the fastest, such as Jung-gu in Seoul (2,441 to 3,111), Geumcheon-gu in Seoul (388 to 1,042), Gangseo-gu in Busan (449 to 1,004), Jongno-gu in Seoul (1,182 to 1,721), and Jung-gu in Busan (1,122 to 1,593).