| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 7.83203 |
| 2021 | 7.59412 |
| 2020 | 7.38425 |
| 2019 | 7.23557 |
| 2018 | 7.11547 |
| 2017 | 6.91576 |
| 2016 | 6.74105 |
| 2015 | 6.73705 |
| 2014 | 6.9029 |
| 2013 | 7.27394 |
| 2012 | 7.77204 |
| 2011 | 8.28259 |
| 2010 | 8.79543 |
| 2009 | 9.22446 |
| 2008 | 9.50603 |
| 2007 | 9.58899 |
| 2006 | 9.52994 |
| 2005 | 9.45847 |
| 2004 | 9.37743 |
| 2003 | 9.39627 |
| 2002 | 9.42476 |
| 2001 | 9.00371 |
| 2000 | 8.2033 |
| 1999 | 7.41558 |
| 1998 | 6.65682 |
| 1997 | 6.23318 |
| 1996 | 6.40536 |
| 1995 | 6.87242 |
| 1994 | 7.33937 |
| 1993 | 7.62283 |
| 1992 | 7.67195 |
| 1991 | 7.62655 |
| 1990 | 7.52742 |
| 1989 | 7.33016 |
| 1988 | 7.07489 |
| 1987 | 6.75668 |
| 1986 | 6.42887 |
| 1985 | 6.11934 |
| 1984 | 5.81679 |
| 1983 | 5.57359 |
| 1982 | 5.37671 |
| 1981 | 5.26627 |
| 1980 | 5.23171 |
| 1979 | 5.22701 |
| 1978 | 5.25744 |
| 1977 | 5.32933 |
| 1976 | 5.39372 |
| 1975 | 5.45881 |
| 1974 | 5.56282 |
| 1973 | 5.68567 |
| 1972 | 5.76287 |
| 1971 | 5.78788 |
| 1970 | 5.81289 |
| 1969 | 5.83302 |
| 1968 | 5.82608 |
| 1967 | 5.82019 |
| 1966 | 5.82157 |
| 1965 | 5.83687 |
| 1964 | 5.88984 |
| 1963 | 5.95328 |
| 1962 | 5.97992 |
| 1961 | 5.96788 |
| 1960 | 5.90648 |