| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 5.30164 |
| 2021 | 5.24623 |
| 2020 | 5.24808 |
| 2019 | 5.27986 |
| 2018 | 5.32163 |
| 2017 | 5.40338 |
| 2016 | 5.52026 |
| 2015 | 5.64747 |
| 2014 | 5.81509 |
| 2013 | 6.04499 |
| 2012 | 6.31018 |
| 2011 | 6.63 |
| 2010 | 7.14874 |
| 2009 | 7.78641 |
| 2008 | 8.33127 |
| 2007 | 8.84411 |
| 2006 | 9.26699 |
| 2005 | 9.32741 |
| 2004 | 9.11935 |
| 2003 | 8.88438 |
| 2002 | 8.68471 |
| 2001 | 8.5221 |
| 2000 | 8.37829 |
| 1999 | 8.28114 |
| 1998 | 8.19832 |
| 1997 | 8.01325 |
| 1996 | 7.84954 |
| 1995 | 7.88678 |
| 1994 | 8.12334 |
| 1993 | 8.6023 |
| 1992 | 9.23672 |
| 1991 | 9.90054 |
| 1990 | 10.6099 |
| 1989 | 11.2539 |
| 1988 | 11.7284 |
| 1987 | 11.9756 |
| 1986 | 12.0539 |
| 1985 | 12.1025 |
| 1984 | 12.1223 |
| 1983 | 12.2573 |
| 1982 | 12.4144 |
| 1981 | 11.9829 |
| 1980 | 11.0174 |
| 1979 | 10.0416 |
| 1978 | 9.08183 |
| 1977 | 8.55879 |
| 1976 | 8.84905 |
| 1975 | 9.56176 |
| 1974 | 10.3089 |
| 1973 | 10.8407 |
| 1972 | 11.0647 |
| 1971 | 11.1556 |
| 1970 | 11.1495 |
| 1969 | 10.9646 |
| 1968 | 10.666 |
| 1967 | 10.2037 |
| 1966 | 9.68925 |
| 1965 | 9.23981 |
| 1964 | 8.81923 |
| 1963 | 8.52933 |
| 1962 | 8.3219 |
| 1961 | 8.13879 |
| 1960 | 7.96915 |