Table 1-4: Mean age and dependency ratio: Medium-, high-, and low-fertility (medium-mortality) projection | |||||||||||||
Year | Medium-fertility (medium-mortality) projection | High-fertility (medium-mortality) projection | Low-fertility (medium-mortality) projection | ||||||||||
Mean Age (year) | Dependency
Ratio (per 100) |
Mean Age (year) | Dependency
Ratio (per 100) |
Mean Age (year) | Dependency
Ratio (per 100) |
||||||||
Total | Young -age |
Old-age | Total | Young -age |
Old-age | Total | Young -age |
Old-age | |||||
2015 | 46.4 | 64.5 | 20.6 | 43.8 | 46.4 | 64.5 | 20.6 | 43.8 | 46.4 | 64.5 | 20.6 | 43.8 | |
2016 | 46.7 | 65.8 | 20.6 | 45.2 | 46.7 | 65.9 | 20.7 | 45.2 | 46.7 | 65.8 | 20.6 | 45.2 | |
2017 | 47.0 | 67.0 | 20.6 | 46.4 | 46.9 | 67.1 | 20.7 | 46.4 | 47.0 | 66.9 | 20.5 | 46.4 | |
2018 | 47.2 | 67.9 | 20.5 | 47.4 | 47.2 | 68.1 | 20.7 | 47.4 | 47.3 | 67.7 | 20.3 | 47.4 | |
2019 | 47.5 | 68.5 | 20.4 | 48.1 | 47.4 | 68.8 | 20.7 | 48.1 | 47.6 | 68.3 | 20.1 | 48.1 | |
2020 | 47.8 | 69.2 | 20.4 | 48.9 | 47.6 | 69.7 | 20.8 | 48.9 | 47.9 | 68.8 | 19.9 | 48.9 | |
2021 | 48.0 | 69.7 | 20.3 | 49.5 | 47.8 | 70.4 | 20.9 | 49.5 | 48.2 | 69.2 | 19.7 | 49.5 | |
2022 | 48.3 | 70.0 | 20.1 | 49.9 | 48.0 | 70.8 | 20.9 | 49.9 | 48.5 | 69.2 | 19.4 | 49.9 | |
2023 | 48.5 | 70.3 | 19.9 | 50.3 | 48.2 | 71.3 | 20.9 | 50.3 | 48.7 | 69.3 | 19.0 | 50.3 | |
2024 | 48.7 | 70.6 | 19.8 | 50.8 | 48.4 | 71.9 | 21.0 | 50.8 | 49.0 | 69.5 | 18.7 | 50.8 | |
2025 | 49.0 | 70.9 | 19.6 | 51.3 | 48.6 | 72.3 | 21.1 | 51.3 | 49.3 | 69.6 | 18.3 | 51.3 | |
2026 | 49.2 | 71.1 | 19.5 | 51.7 | 48.8 | 72.8 | 21.1 | 51.7 | 49.6 | 69.7 | 18.0 | 51.7 | |
2027 | 49.4 | 71.4 | 19.4 | 52.1 | 48.9 | 73.3 | 21.2 | 52.1 | 49.8 | 69.8 | 17.7 | 52.1 | |
2028 | 49.6 | 71.9 | 19.2 | 52.6 | 49.1 | 73.9 | 21.3 | 52.6 | 50.1 | 70.0 | 17.4 | 52.6 | |
2029 | 49.8 | 72.4 | 19.2 | 53.2 | 49.2 | 74.7 | 21.5 | 53.2 | 50.3 | 70.4 | 17.2 | 53.2 | |
2030 | 50.0 | 73.3 | 19.2 | 54.0 | 49.3 | 75.7 | 21.7 | 54.0 | 50.5 | 71.0 | 17.0 | 54.0 | |
2031 | 50.1 | 73.2 | 19.1 | 54.1 | 49.5 | 75.8 | 21.7 | 54.1 | 50.7 | 70.9 | 16.7 | 54.2 | |
2032 | 50.3 | 74.1 | 19.0 | 55.1 | 49.6 | 76.8 | 21.8 | 55.0 | 50.9 | 71.7 | 16.6 | 55.1 | |
2033 | 50.4 | 75.1 | 19.0 | 56.0 | 49.7 | 77.8 | 21.9 | 55.9 | 51.1 | 72.6 | 16.5 | 56.1 | |
2034 | 50.6 | 76.2 | 19.1 | 57.1 | 49.8 | 78.8 | 22.0 | 56.9 | 51.3 | 73.7 | 16.5 | 57.3 | |
2035 | 50.7 | 77.4 | 19.2 | 58.2 | 49.9 | 80.0 | 22.1 | 57.9 | 51.5 | 75.1 | 16.5 | 58.5 | |
2036 | 50.9 | 78.9 | 19.3 | 59.5 | 50.0 | 81.3 | 22.2 | 59.1 | 51.7 | 76.6 | 16.7 | 59.9 | |
2037 | 51.0 | 80.5 | 19.5 | 61.0 | 50.1 | 82.7 | 22.3 | 60.5 | 51.8 | 78.4 | 16.8 | 61.6 | |
2038 | 51.1 | 82.3 | 19.6 | 62.6 | 50.2 | 84.3 | 22.4 | 61.9 | 52.0 | 80.4 | 17.0 | 63.3 | |
2039 | 51.2 | 84.0 | 19.8 | 64.2 | 50.3 | 85.8 | 22.5 | 63.3 | 52.2 | 82.3 | 17.3 | 65.1 | |
2040 | 51.4 | 85.6 | 20.0 | 65.6 | 50.4 | 87.0 | 22.6 | 64.5 | 52.3 | 84.1 | 17.5 | 66.6 | |
2041 | 51.5 | 86.9 | 20.1 | 66.8 | 50.4 | 88.1 | 22.6 | 65.5 | 52.4 | 85.6 | 17.6 | 68.0 | |
2042 | 51.6 | 88.0 | 20.2 | 67.8 | 50.5 | 88.9 | 22.7 | 66.3 | 52.6 | 87.0 | 17.8 | 69.2 | |
2043 | 51.7 | 89.0 | 20.3 | 68.7 | 50.6 | 89.7 | 22.7 | 67.0 | 52.7 | 88.2 | 17.9 | 70.3 | |
2044 | 51.8 | 89.8 | 20.3 | 69.5 | 50.6 | 90.3 | 22.7 | 67.6 | 52.9 | 89.3 | 18.0 | 71.3 | |
2045 | 51.9 | 90.6 | 20.4 | 70.2 | 50.7 | 90.8 | 22.7 | 68.1 | 53.0 | 90.2 | 18.1 | 72.2 | |
2046 | 52.0 | 91.1 | 20.4 | 70.7 | 50.8 | 91.1 | 22.7 | 68.4 | 53.1 | 91.0 | 18.1 | 72.9 | |
2047 | 52.0 | 91.7 | 20.4 | 71.3 | 50.8 | 91.5 | 22.7 | 68.8 | 53.3 | 91.8 | 18.1 | 73.7 | |
2048 | 52.1 | 92.3 | 20.4 | 71.8 | 50.9 | 91.9 | 22.8 | 69.1 | 53.4 | 92.6 | 18.1 | 74.5 | |
2049 | 52.2 | 92.8 | 20.4 | 72.4 | 50.9 | 92.3 | 22.8 | 69.5 | 53.6 | 93.3 | 18.1 | 75.2 | |
2050 | 52.3 | 93.2 | 20.4 | 72.8 | 50.9 | 92.6 | 22.8 | 69.7 | 53.7 | 93.9 | 18.1 | 75.9 | |
2051 | 52.4 | 93.5 | 20.4 | 73.1 | 51.0 | 92.7 | 22.9 | 69.8 | 53.8 | 94.4 | 18.0 | 76.4 | |
2052 | 52.5 | 93.7 | 20.3 | 73.4 | 51.0 | 92.8 | 22.9 | 69.9 | 54.0 | 94.8 | 17.9 | 76.9 | |
2053 | 52.6 | 93.9 | 20.3 | 73.6 | 51.1 | 92.9 | 22.9 | 69.9 | 54.2 | 95.0 | 17.8 | 77.3 | |
2054 | 52.7 | 93.9 | 20.2 | 73.7 | 51.1 | 92.8 | 23.0 | 69.8 | 54.3 | 95.2 | 17.6 | 77.6 | |
2055 | 52.8 | 93.8 | 20.1 | 73.7 | 51.2 | 92.7 | 23.0 | 69.7 | 54.5 | 95.3 | 17.5 | 77.8 | |
2056 | 52.9 | 93.7 | 20.1 | 73.6 | 51.2 | 92.5 | 23.0 | 69.4 | 54.6 | 95.3 | 17.3 | 78.0 | |
2057 | 53.0 | 93.6 | 20.0 | 73.7 | 51.2 | 92.4 | 23.1 | 69.3 | 54.8 | 95.4 | 17.2 | 78.2 | |
2058 | 53.1 | 93.6 | 19.9 | 73.6 | 51.2 | 92.2 | 23.1 | 69.1 | 54.9 | 95.4 | 17.0 | 78.4 | |
2059 | 53.2 | 93.6 | 19.9 | 73.7 | 51.2 | 92.1 | 23.2 | 68.9 | 55.0 | 95.6 | 16.9 | 78.8 | |
2060 | 53.2 | 93.7 | 19.8 | 73.9 | 51.2 | 92.1 | 23.2 | 68.8 | 55.1 | 95.9 | 16.8 | 79.2 | |
2061 | 53.3 | 93.8 | 19.8 | 74.0 | 51.2 | 92.0 | 23.3 | 68.7 | 55.3 | 96.2 | 16.7 | 79.5 | |
2062 | 53.3 | 93.9 | 19.8 | 74.1 | 51.2 | 92.0 | 23.3 | 68.6 | 55.4 | 96.6 | 16.6 | 80.0 | |
2063 | 53.4 | 94.1 | 19.8 | 74.3 | 51.2 | 91.9 | 23.4 | 68.5 | 55.5 | 97.0 | 16.5 | 80.5 | |
2064 | 53.4 | 94.3 | 19.8 | 74.5 | 51.2 | 91.8 | 23.4 | 68.4 | 55.5 | 97.5 | 16.5 | 81.0 | |
2065 | 53.4 | 94.5 | 19.8 | 74.6 | 51.2 | 91.7 | 23.4 | 68.3 | 55.6 | 98.0 | 16.5 | 81.5 | |
Current population as of October 1 of each year. Indices for
2015 are based on the jump-off population from the 2015 Population Census by
the Statistics Bureau of the Ministry of Internal Affairs and Communications
(Unknown age and nationality population is included after being prorated to
each age and nationality population.) The dependency ratio is a ratio obtained by dividing dependent population by the working-age population (15 to 64 years of age). This table shows the number of dependent people per 100 working-age people. The ratio of the young-age population only (under 15 years of age), out of the dependent population, divided by the working-age population is called the young-age dependency ratio, while the ratio of the old-age population only (aged 65 and over) divided by the working-age population is called the old-age dependency ratio; these indices are indicated simply as young-age and old-age population. The age dependency ratio is the sum of the young-age and old-age dependency ratio. |
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