| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 7.62644 |
| 2021 | 7.43491 |
| 2020 | 7.26335 |
| 2019 | 7.14391 |
| 2018 | 7.04637 |
| 2017 | 6.86662 |
| 2016 | 6.70897 |
| 2015 | 6.71886 |
| 2014 | 6.89746 |
| 2013 | 7.28085 |
| 2012 | 7.79044 |
| 2011 | 8.31224 |
| 2010 | 8.8375 |
| 2009 | 9.27949 |
| 2008 | 9.57437 |
| 2007 | 9.66915 |
| 2006 | 9.61961 |
| 2005 | 9.55588 |
| 2004 | 9.4797 |
| 2003 | 9.50197 |
| 2002 | 9.5322 |
| 2001 | 9.10592 |
| 2000 | 8.29418 |
| 1999 | 7.49305 |
| 1998 | 6.72097 |
| 1997 | 6.2892 |
| 1996 | 6.46082 |
| 1995 | 6.93339 |
| 1994 | 7.41131 |
| 1993 | 7.70929 |
| 1992 | 7.77355 |
| 1991 | 7.73914 |
| 1990 | 7.64512 |
| 1989 | 7.4373 |
| 1988 | 7.14666 |
| 1987 | 6.76446 |
| 1986 | 6.3618 |
| 1985 | 5.98736 |
| 1984 | 5.62764 |
| 1983 | 5.34099 |
| 1982 | 5.12418 |
| 1981 | 4.99739 |
| 1980 | 4.9272 |
| 1979 | 4.88723 |
| 1978 | 4.88275 |
| 1977 | 4.91508 |
| 1976 | 4.95719 |
| 1975 | 5.03053 |
| 1974 | 5.15646 |
| 1973 | 5.30362 |
| 1972 | 5.41376 |
| 1971 | 5.46393 |
| 1970 | 5.4908 |
| 1969 | 5.51102 |
| 1968 | 5.52328 |
| 1967 | 5.53899 |
| 1966 | 5.56081 |
| 1965 | 5.60526 |
| 1964 | 5.68967 |
| 1963 | 5.78396 |
| 1962 | 5.84517 |
| 1961 | 5.8659 |
| 1960 | 5.82894 |