| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 2.47503 |
| 2021 | 2.35307 |
| 2020 | 2.26331 |
| 2019 | 2.19377 |
| 2018 | 2.14477 |
| 2017 | 2.11452 |
| 2016 | 2.08685 |
| 2015 | 2.06744 |
| 2014 | 2.06727 |
| 2013 | 2.07173 |
| 2012 | 2.05876 |
| 2011 | 2.0216 |
| 2010 | 1.97031 |
| 2009 | 1.91428 |
| 2008 | 1.85437 |
| 2007 | 1.79883 |
| 2006 | 1.74961 |
| 2005 | 1.70191 |
| 2004 | 1.66085 |
| 2003 | 1.61668 |
| 2002 | 1.56489 |
| 2001 | 1.5234 |
| 2000 | 1.48291 |
| 1999 | 1.42985 |
| 1998 | 1.37423 |
| 1997 | 1.33032 |
| 1996 | 1.29448 |
| 1995 | 1.25718 |
| 1994 | 1.22639 |
| 1993 | 1.20582 |
| 1992 | 1.17972 |
| 1991 | 1.14561 |
| 1990 | 1.11504 |
| 1989 | 1.08803 |
| 1988 | 1.06279 |
| 1987 | 1.04748 |
| 1986 | 1.04425 |
| 1985 | 1.04226 |
| 1984 | 1.03076 |
| 1983 | 1.01526 |
| 1982 | 1.00459 |
| 1981 | 0.990887 |
| 1980 | 0.965968 |
| 1979 | 0.930942 |
| 1978 | 0.889015 |
| 1977 | 0.848261 |
| 1976 | 0.812169 |
| 1975 | 0.782892 |
| 1974 | 0.767062 |
| 1973 | 0.760332 |
| 1972 | 0.754622 |
| 1971 | 0.747554 |
| 1970 | 0.736985 |
| 1969 | 0.726606 |
| 1968 | 0.719416 |
| 1967 | 0.713735 |
| 1966 | 0.715002 |
| 1965 | 0.724182 |
| 1964 | 0.731094 |
| 1963 | 0.737195 |
| 1962 | 0.748141 |
| 1961 | 0.76653 |
| 1960 | 0.800194 |