| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 5.9203 |
| 2021 | 5.98989 |
| 2020 | 6.0692 |
| 2019 | 6.19518 |
| 2018 | 6.38899 |
| 2017 | 6.61954 |
| 2016 | 6.90726 |
| 2015 | 7.39335 |
| 2014 | 7.99495 |
| 2013 | 8.49978 |
| 2012 | 8.97163 |
| 2011 | 9.35097 |
| 2010 | 9.36069 |
| 2009 | 9.10515 |
| 2008 | 8.83111 |
| 2007 | 8.59519 |
| 2006 | 8.39902 |
| 2005 | 8.22616 |
| 2004 | 8.10566 |
| 2003 | 8.00435 |
| 2002 | 7.80323 |
| 2001 | 7.62267 |
| 2000 | 7.63856 |
| 1999 | 7.84489 |
| 1998 | 8.27844 |
| 1997 | 8.85645 |
| 1996 | 9.45486 |
| 1995 | 10.0681 |
| 1994 | 10.5929 |
| 1993 | 10.9588 |
| 1992 | 11.1112 |
| 1991 | 11.1155 |
| 1990 | 11.1396 |
| 1989 | 11.1761 |
| 1988 | 11.3253 |
| 1987 | 11.4902 |
| 1986 | 11.1052 |
| 1985 | 10.2217 |
| 1984 | 9.32288 |
| 1983 | 8.43835 |
| 1982 | 7.96913 |
| 1981 | 8.25246 |
| 1980 | 8.9033 |
| 1979 | 9.55143 |
| 1978 | 9.95499 |
| 1977 | 10.0447 |
| 1976 | 10.0095 |
| 1975 | 9.88735 |
| 1974 | 9.63655 |
| 1973 | 9.34037 |
| 1972 | 8.97133 |
| 1971 | 8.59608 |
| 1970 | 8.26725 |
| 1969 | 7.95806 |
| 1968 | 7.73236 |
| 1967 | 7.54603 |
| 1966 | 7.46578 |
| 1965 | 7.51765 |
| 1964 | 7.62668 |
| 1963 | 7.81971 |
| 1962 | 8.07478 |
| 1961 | 8.20521 |
| 1960 | 8.23537 |