Source： National Institute of Population and Social Security Research, Ministry of Health and Welfare, Latest Demographic Statistics, 1997, Tokyo; Statistics Bureau, Management and Coordination Agency, the 1995 Population Census, Tokyo, 1997.
Columns (2) to (4) in these tables show percentages of population for the well-known three major age categories - under 15, 15-64 and 65 + (See also Figure 5). Columns (5) to (7) show age-dependency ratios - total dependency (See also Figure 6), child-dependency and old-age dependency. The last column indicates a relatively new concept, that is, the ratio of the elderly to children.
