| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.510049 |
| 2020 | 0.168349 |
| 2019 | 0.272313 |
| 2018 | 0.178922 |
| 2017 | 0.23589 |
| 2016 | 0.185155 |
| 2015 | 0.203345 |
| 2014 | 0.358822 |
| 2013 | 0.604284 |
| 2012 | 0.783715 |
| 2011 | 2.33286 |
| 2010 | 2.02001 |
| 2009 | 0.996363 |
| 2008 | 2.36221 |
| 2007 | 2.15746 |
| 2006 | 1.17113 |
| 2005 | 0.719382 |
| 2004 | 0.263034 |
| 2003 | 0.137302 |
| 2002 | 0.127807 |
| 2001 | 0.124862 |
| 2000 | 0.143065 |
| 1999 | 0.337011 |
| 1998 | 0.438149 |
| 1997 | 0.234161 |
| 1996 | 0.238792 |
| 1995 | 0.317944 |
| 1994 | 0.444569 |
| 1993 | 0.523713 |
| 1992 | 0.689419 |
| 1991 | 0.742893 |
| 1990 | 0.376865 |
| 1989 | 0.395103 |
| 1988 | 1.11137 |
| 1987 | 0.258694 |
| 1986 | 0.175061 |
| 1985 | 0.254013 |
| 1984 | 0.287607 |
| 1983 | 0.407939 |
| 1982 | 0.465098 |
| 1981 | 0.532478 |
| 1980 | 0.404616 |
| 1979 | 0.354068 |
| 1978 | 0.280545 |
| 1977 | 0.423541 |
| 1976 | 0.42132 |
| 1975 | 0.220501 |
| 1974 | 0.319417 |
| 1973 | 0.17516 |
| 1972 | 0.111912 |
| 1971 | 0.142432 |
| 1970 | 0.190312 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |