| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 4.7921 |
| 2021 | 4.95925 |
| 2020 | 4.77226 |
| 2019 | 4.90676 |
| 2018 | 5.0485 |
| 2017 | 5.26287 |
| 2016 | 5.47673 |
| 2015 | 5.60489 |
| 2014 | 5.98954 |
| 2013 | 5.96763 |
| 2012 | 6.0354 |
| 2011 | 6.16618 |
| 2010 | 6.96912 |
| 2009 | 7.39929 |
| 2008 | 7.64651 |
| 2007 | 9.62774 |
| 2006 | 10.1873 |
| 2005 | 10.2288 |
| 2004 | 10.8798 |
| 2003 | 10.9738 |
| 2002 | 11.1891 |
| 2001 | 11.4199 |
| 2000 | 11.3387 |
| 1999 | 12.5207 |
| 1998 | 13.0583 |
| 1997 | 14.095 |
| 1996 | 14.9528 |
| 1995 | 15.1579 |
| 1994 | 14.0884 |
| 1993 | 14.7961 |
| 1992 | 16.8676 |
| 1991 | 14.2536 |
| 1990 | 13.7474 |
| 1989 | 13.2063 |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |