| 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 | - |