| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 5.82201 |
| 2021 | 5.71862 |
| 2020 | 5.6415 |
| 2019 | 5.54932 |
| 2018 | 5.45388 |
| 2017 | 5.38624 |
| 2016 | 5.36037 |
| 2015 | 5.38912 |
| 2014 | 5.4423 |
| 2013 | 5.50072 |
| 2012 | 5.59495 |
| 2011 | 5.72004 |
| 2010 | 5.85515 |
| 2009 | 6.03176 |
| 2008 | 6.27106 |
| 2007 | 6.5445 |
| 2006 | 6.87394 |
| 2005 | 7.41093 |
| 2004 | 8.0686 |
| 2003 | 8.62829 |
| 2002 | 9.15587 |
| 2001 | 9.59369 |
| 2000 | 9.66084 |
| 1999 | 9.45046 |
| 1998 | 9.21263 |
| 1997 | 9.01433 |
| 1996 | 8.856 |
| 1995 | 8.71928 |
| 1994 | 8.63665 |
| 1993 | 8.57438 |
| 1992 | 8.40742 |
| 1991 | 8.26742 |
| 1990 | 8.36018 |
| 1989 | 8.68114 |
| 1988 | 9.25856 |
| 1987 | 10.0105 |
| 1986 | 10.7964 |
| 1985 | 11.5935 |
| 1984 | 12.281 |
| 1983 | 12.7752 |
| 1982 | 13.0257 |
| 1981 | 13.0978 |
| 1980 | 13.1386 |
| 1979 | 13.1543 |
| 1978 | 13.2958 |
| 1977 | 13.4419 |
| 1976 | 12.9535 |
| 1975 | 11.9196 |
| 1974 | 10.9009 |
| 1973 | 9.92454 |
| 1972 | 9.43477 |
| 1971 | 9.84502 |
| 1970 | 10.7433 |
| 1969 | 11.6875 |
| 1968 | 12.3787 |
| 1967 | 12.6855 |
| 1966 | 12.8104 |
| 1965 | 12.8259 |
| 1964 | 12.6347 |
| 1963 | 12.3414 |
| 1962 | 11.8607 |
| 1961 | 11.1815 |
| 1960 | 10.4597 |