| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 1.82764 |
| 2021 | 1.77397 |
| 2020 | 1.72521 |
| 2019 | 1.68212 |
| 2018 | 1.63693 |
| 2017 | 1.58979 |
| 2016 | 1.54166 |
| 2015 | 1.48643 |
| 2014 | 1.42869 |
| 2013 | 1.36649 |
| 2012 | 1.30682 |
| 2011 | 1.25582 |
| 2010 | 1.20282 |
| 2009 | 1.14872 |
| 2008 | 1.09548 |
| 2007 | 1.04181 |
| 2006 | 0.993359 |
| 2005 | 0.943841 |
| 2004 | 0.889326 |
| 2003 | 0.838395 |
| 2002 | 0.794356 |
| 2001 | 0.752572 |
| 2000 | 0.711497 |
| 1999 | 0.674195 |
| 1998 | 0.643024 |
| 1997 | 0.613849 |
| 1996 | 0.584019 |
| 1995 | 0.55389 |
| 1994 | 0.521511 |
| 1993 | 0.48922 |
| 1992 | 0.462659 |
| 1991 | 0.442422 |
| 1990 | 0.425191 |
| 1989 | 0.407448 |
| 1988 | 0.389556 |
| 1987 | 0.374199 |
| 1986 | 0.359524 |
| 1985 | 0.343583 |
| 1984 | 0.326931 |
| 1983 | 0.30893 |
| 1982 | 0.291099 |
| 1981 | 0.274775 |
| 1980 | 0.260008 |
| 1979 | 0.248445 |
| 1978 | 0.238082 |
| 1977 | 0.22699 |
| 1976 | 0.217065 |
| 1975 | 0.208372 |
| 1974 | 0.200462 |
| 1973 | 0.193223 |
| 1972 | 0.187021 |
| 1971 | 0.183935 |
| 1970 | 0.184122 |
| 1969 | 0.184345 |
| 1968 | 0.183154 |
| 1967 | 0.182122 |
| 1966 | 0.182952 |
| 1965 | 0.186984 |
| 1964 | 0.193625 |
| 1963 | 0.20114 |
| 1962 | 0.20766 |
| 1961 | 0.214496 |
| 1960 | 0.226018 |