| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 8.71194 |
| 2021 | 8.61092 |
| 2020 | 8.50354 |
| 2019 | 8.39782 |
| 2018 | 8.38976 |
| 2017 | 8.40179 |
| 2016 | 8.02125 |
| 2015 | 7.29702 |
| 2014 | 6.58385 |
| 2013 | 5.89789 |
| 2012 | 5.51019 |
| 2011 | 5.65302 |
| 2010 | 6.05581 |
| 2009 | 6.45896 |
| 2008 | 6.69878 |
| 2007 | 6.72623 |
| 2006 | 6.65948 |
| 2005 | 6.5212 |
| 2004 | 6.27192 |
| 2003 | 5.95701 |
| 2002 | 5.56774 |
| 2001 | 5.16901 |
| 2000 | 4.80898 |
| 1999 | 4.47366 |
| 1998 | 4.20707 |
| 1997 | 3.99712 |
| 1996 | 3.85866 |
| 1995 | 3.77151 |
| 1994 | 3.71284 |
| 1993 | 3.68611 |
| 1992 | 3.6908 |
| 1991 | 3.70281 |
| 1990 | 3.74362 |
| 1989 | 3.82362 |
| 1988 | 3.90724 |
| 1987 | 3.95834 |
| 1986 | 3.96095 |
| 1985 | 3.93381 |
| 1984 | 3.89316 |
| 1983 | 3.84123 |
| 1982 | 3.80124 |
| 1981 | 3.77234 |
| 1980 | 3.74568 |
| 1979 | 3.73764 |
| 1978 | 3.72062 |
| 1977 | 3.68364 |
| 1976 | 3.67264 |
| 1975 | 3.6672 |
| 1974 | 3.63527 |
| 1973 | 3.60503 |
| 1972 | 3.60844 |
| 1971 | 3.63583 |
| 1970 | 3.66835 |
| 1969 | 3.72224 |
| 1968 | 3.80261 |
| 1967 | 3.84956 |
| 1966 | 3.85198 |
| 1965 | 3.86419 |
| 1964 | 3.8974 |
| 1963 | 3.95384 |
| 1962 | 4.02928 |
| 1961 | 4.09205 |
| 1960 | 4.13255 |