| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 4.65029 |
| 2021 | 4.72016 |
| 2020 | 5.01691 |
| 2019 | 5.3133 |
| 2018 | 5.47511 |
| 2017 | 5.4667 |
| 2016 | 5.39261 |
| 2015 | 5.26591 |
| 2014 | 5.06108 |
| 2013 | 4.82376 |
| 2012 | 4.54678 |
| 2011 | 4.26879 |
| 2010 | 4.01268 |
| 2009 | 3.77168 |
| 2008 | 3.57797 |
| 2007 | 3.41019 |
| 2006 | 3.29286 |
| 2005 | 3.22665 |
| 2004 | 3.18228 |
| 2003 | 3.16149 |
| 2002 | 3.16608 |
| 2001 | 3.16263 |
| 2000 | 3.15581 |
| 1999 | 3.16569 |
| 1998 | 3.17643 |
| 1997 | 3.15614 |
| 1996 | 3.10519 |
| 1995 | 3.04952 |
| 1994 | 2.98997 |
| 1993 | 2.91674 |
| 1992 | 2.85144 |
| 1991 | 2.79871 |
| 1990 | 2.75543 |
| 1989 | 2.73064 |
| 1988 | 2.69983 |
| 1987 | 2.65592 |
| 1986 | 2.62891 |
| 1985 | 2.59906 |
| 1984 | 2.54188 |
| 1983 | 2.47874 |
| 1982 | 2.43719 |
| 1981 | 2.40728 |
| 1980 | 2.37502 |
| 1979 | 2.3605 |
| 1978 | 2.36564 |
| 1977 | 2.35452 |
| 1976 | 2.32181 |
| 1975 | 2.28669 |
| 1974 | 2.25066 |
| 1973 | 2.21647 |
| 1972 | 2.19967 |
| 1971 | 2.20713 |
| 1970 | 2.226 |
| 1969 | 2.24046 |
| 1968 | 2.2615 |
| 1967 | 2.29072 |
| 1966 | 2.3123 |
| 1965 | 2.32437 |
| 1964 | 2.3205 |
| 1963 | 2.31297 |
| 1962 | 2.31303 |
| 1961 | 2.30493 |
| 1960 | 2.31144 |