| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.0708434 |
| 2020 | 0.0860228 |
| 2019 | 0.0873021 |
| 2018 | 0.097326 |
| 2017 | 0.120214 |
| 2016 | 0.103468 |
| 2015 | 0.0967515 |
| 2014 | 0.142384 |
| 2013 | 0.126224 |
| 2012 | 0.141421 |
| 2011 | 0.164686 |
| 2010 | 0.188632 |
| 2009 | 0.199418 |
| 2008 | 0.225379 |
| 2007 | 0.182953 |
| 2006 | 0.138538 |
| 2005 | 0.143363 |
| 2004 | 0.188707 |
| 2003 | 0.240689 |
| 2002 | 0.206403 |
| 2001 | 0.21079 |
| 2000 | 0.222728 |
| 1999 | 0.253558 |
| 1998 | 0.406925 |
| 1997 | 0.505692 |
| 1996 | 0.676547 |
| 1995 | 0.769146 |
| 1994 | 0.73176 |
| 1993 | 0.840487 |
| 1992 | 0.879295 |
| 1991 | 0.851311 |
| 1990 | 0.874344 |
| 1989 | 0.920649 |
| 1988 | 0.967325 |
| 1987 | 1.11438 |
| 1986 | 1.007 |
| 1985 | 0.798554 |
| 1984 | 0.828554 |
| 1983 | 1.20561 |
| 1982 | 1.46374 |
| 1981 | 1.45196 |
| 1980 | 2.18419 |
| 1979 | 2.07581 |
| 1978 | 1.73765 |
| 1977 | 1.57353 |
| 1976 | 1.46098 |
| 1975 | 1.1301 |
| 1974 | 1.10999 |
| 1973 | 1.19277 |
| 1972 | 0.594565 |
| 1971 | 0.518878 |
| 1970 | 0.626112 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |