| 年份 | 儿童 (%) |
|---|---|
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | 15.25 |
| 2018 | 15.14 |
| 2017 | 15.07 |
| 2016 | 15.13 |
| 2015 | 15.25 |
| 2014 | 15.33 |
| 2013 | 15.41 |
| 2012 | 15.47 |
| 2011 | 15.53 |
| 2010 | 15.63 |
| 2009 | 15.80 |
| 2008 | 16.00 |
| 2007 | 16.21 |
| 2006 | 16.42 |
| 2005 | 16.64 |
| 2004 | 16.83 |
| 2003 | 16.97 |
| 2002 | 17.04 |
| 2001 | 17.07 |
| 2000 | 17.14 |
| 1999 | 17.25 |
| 1998 | 17.28 |
| 1997 | 17.24 |
| 1996 | 17.12 |
| 1995 | 17.03 |
| 1994 | 16.93 |
| 1993 | 16.74 |
| 1992 | 16.49 |
| 1991 | 16.21 |
| 1990 | 16.05 |
| 1989 | 16.02 |
| 1988 | 16.04 |
| 1987 | 16.12 |
| 1986 | 16.23 |
| 1985 | 16.47 |
| 1984 | 16.80 |
| 1983 | 17.14 |
| 1982 | 17.48 |
| 1981 | 17.86 |
| 1980 | 18.29 |
| 1979 | 18.77 |
| 1978 | 19.24 |
| 1977 | 19.62 |
| 1976 | 19.96 |
| 1975 | 20.42 |
| 1974 | 20.94 |
| 1973 | 21.32 |
| 1972 | 21.55 |
| 1971 | 21.59 |
| 1970 | 21.48 |
| 1969 | 21.37 |
| 1968 | 21.27 |
| 1967 | 21.17 |
| 1966 | 21.11 |
| 1965 | 21.11 |
| 1964 | 21.17 |
| 1963 | 21.25 |
| 1962 | 21.31 |
| 1961 | 21.30 |
| 1960 | 21.22 |
