| 年份 | 美国儿童(14岁及以下)占总人口比重 | 日本儿童(14岁及以下)占总人口比重 |
|---|---|---|
| 2021 | 18.24% | 11.77% |
| 2020 | 18.51% | 11.92% |
| 2019 | 18.74% | 12.07% |
| 2018 | 18.91% | 12.24% |
| 2017 | 19.06% | 12.40% |
| 2016 | 19.17% | 12.55% |
| 2015 | 19.30% | 12.67% |
| 2014 | 19.42% | 12.79% |
| 2013 | 19.54% | 12.90% |
| 2012 | 19.64% | 13.01% |
| 2011 | 19.74% | 13.11% |
| 2010 | 19.87% | 13.20% |
| 2009 | 20.01% | 13.30% |
| 2008 | 20.14% | 13.39% |
| 2007 | 20.27% | 13.46% |
| 2006 | 20.42% | 13.55% |
| 2005 | 20.61% | 13.64% |
| 2004 | 20.82% | 13.75% |
| 2003 | 20.99% | 13.89% |
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| 2002 | 21.14% | 14.04% |
| 2001 | 21.29% | 14.20% |
| 2000 | 21.43% | 14.37% |
| 1999 | 21.53% | 14.58% |
| 1998 | 21.59% | 14.81% |
| 1997 | 21.65% | 15.05% |
| 1996 | 21.72% | 15.30% |
| 1995 | 21.80% | 15.59% |
| 1994 | 21.86% | 15.93% |
| 1993 | 21.86% | 16.33% |
| 1992 | 21.79% | 16.79% |
| 1991 | 21.68% | 17.29% |
| 1990 | 21.56% | 17.87% |
| 1989 | 21.44% | 18.54% |
| 1988 | 21.36% | 19.24% |
| 1987 | 21.32% | 19.93% |
| 1986 | 21.38% | 20.56% |
| 1985 | 21.53% | 21.13% |
| 1984 | 21.71% | 21.64% |
| 1983 | 21.88% | 22.10% |
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| 1982 | 22.05% | 22.59% |
| 1981 | 22.23% | 22.88% |
| 1980 | 22.47% | 23.10% |
| 1979 | 22.83% | 23.42% |
| 1978 | 23.29% | 23.66% |
| 1977 | 23.83% | 23.82% |
| 1976 | 24.44% | 23.90% |
| 1975 | 25.11% | 23.92% |
| 1974 | 25.78% | 23.86% |
| 1973 | 26.46% | 23.75% |
| 1972 | 27.13% | 23.62% |
| 1971 | 27.75% | 23.52% |
| 1970 | 28.28% | 23.53% |
| 1969 | 28.79% | 23.62% |
| 1968 | 29.28% | 23.77% |
| 1967 | 29.72% | 23.99% |
| 1966 | 30.25% | 24.50% |
| 1965 | 30.58% | 25.18% |
| 1964 | 30.54% | 26.01% |
| 1963 | 30.57% | 27.12% |
| 1962 | 30.75% | 28.27% |
| 1961 | 30.91% | 29.08% |
| 1960 | 30.82% | 29.49% |
| 1959 | 30.59% | 31.09% |