| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 6.52994 |
| 2021 | 6.41755 |
| 2020 | 6.33077 |
| 2019 | 6.2257 |
| 2018 | 6.11563 |
| 2017 | 6.03447 |
| 2016 | 5.99837 |
| 2015 | 6.0216 |
| 2014 | 6.07008 |
| 2013 | 6.12232 |
| 2012 | 6.21185 |
| 2011 | 6.33244 |
| 2010 | 6.46016 |
| 2009 | 6.62943 |
| 2008 | 6.86277 |
| 2007 | 7.12721 |
| 2006 | 7.44586 |
| 2005 | 7.97886 |
| 2004 | 8.63363 |
| 2003 | 9.17963 |
| 2002 | 9.68684 |
| 2001 | 10.096 |
| 2000 | 10.1153 |
| 1999 | 9.84769 |
| 1998 | 9.55772 |
| 1997 | 9.31365 |
| 1996 | 9.11822 |
| 1995 | 8.95379 |
| 1994 | 8.85233 |
| 1993 | 8.77711 |
| 1992 | 8.59784 |
| 1991 | 8.44852 |
| 1990 | 8.53925 |
| 1989 | 8.86301 |
| 1988 | 9.44763 |
| 1987 | 10.2111 |
| 1986 | 11.0093 |
| 1985 | 11.8167 |
| 1984 | 12.5095 |
| 1983 | 13.002 |
| 1982 | 13.2456 |
| 1981 | 13.3079 |
| 1980 | 13.3382 |
| 1979 | 13.3449 |
| 1978 | 13.481 |
| 1977 | 13.6224 |
| 1976 | 13.1224 |
| 1975 | 12.0714 |
| 1974 | 11.0392 |
| 1973 | 10.0544 |
| 1972 | 9.56262 |
| 1971 | 9.97973 |
| 1970 | 10.8849 |
| 1969 | 11.8266 |
| 1968 | 12.5021 |
| 1967 | 12.7818 |
| 1966 | 12.879 |
| 1965 | 12.8708 |
| 1964 | 12.6769 |
| 1963 | 12.4211 |
| 1962 | 12.0245 |
| 1961 | 11.445 |
| 1960 | 10.8044 |