| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 8.15857 |
| 2021 | 7.74366 |
| 2020 | 7.01005 |
| 2019 | 6.30063 |
| 2018 | 5.62568 |
| 2017 | 5.24356 |
| 2016 | 5.37404 |
| 2015 | 5.75309 |
| 2014 | 6.13257 |
| 2013 | 6.35909 |
| 2012 | 6.38672 |
| 2011 | 6.3259 |
| 2010 | 6.19572 |
| 2009 | 5.96041 |
| 2008 | 5.66182 |
| 2007 | 5.2904 |
| 2006 | 4.90781 |
| 2005 | 4.5596 |
| 2004 | 4.23504 |
| 2003 | 3.97696 |
| 2002 | 3.7717 |
| 2001 | 3.633 |
| 2000 | 3.54236 |
| 1999 | 3.47721 |
| 1998 | 3.43985 |
| 1997 | 3.4305 |
| 1996 | 3.42537 |
| 1995 | 3.43762 |
| 1994 | 3.48002 |
| 1993 | 3.52818 |
| 1992 | 3.54634 |
| 1991 | 3.52402 |
| 1990 | 3.49031 |
| 1989 | 3.45555 |
| 1988 | 3.41194 |
| 1987 | 3.37771 |
| 1986 | 3.35217 |
| 1985 | 3.32826 |
| 1984 | 3.31882 |
| 1983 | 3.30091 |
| 1982 | 3.26975 |
| 1981 | 3.26079 |
| 1980 | 3.24821 |
| 1979 | 3.20341 |
| 1978 | 3.14974 |
| 1977 | 3.1186 |
| 1976 | 3.10598 |
| 1975 | 3.09506 |
| 1974 | 3.10385 |
| 1973 | 3.13986 |
| 1972 | 3.15824 |
| 1971 | 3.14808 |
| 1970 | 3.14567 |
| 1969 | 3.16053 |
| 1968 | 3.18695 |
| 1967 | 3.22799 |
| 1966 | 3.29481 |
| 1965 | 3.37748 |
| 1964 | 3.44067 |
| 1963 | 3.50639 |
| 1962 | 3.57831 |
| 1961 | 3.59588 |
| 1960 | 3.55896 |