| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 3.44061 |
| 2021 | 3.19699 |
| 2020 | 2.97992 |
| 2019 | 2.7797 |
| 2018 | 2.62082 |
| 2017 | 2.48568 |
| 2016 | 2.38816 |
| 2015 | 2.32572 |
| 2014 | 2.28122 |
| 2013 | 2.25552 |
| 2012 | 2.24882 |
| 2011 | 2.23605 |
| 2010 | 2.21934 |
| 2009 | 2.21605 |
| 2008 | 2.21416 |
| 2007 | 2.18956 |
| 2006 | 2.14292 |
| 2005 | 2.09129 |
| 2004 | 2.0358 |
| 2003 | 1.96921 |
| 2002 | 1.90689 |
| 2001 | 1.85261 |
| 2000 | 1.79862 |
| 1999 | 1.75182 |
| 1998 | 1.7024 |
| 1997 | 1.6449 |
| 1996 | 1.59879 |
| 1995 | 1.55302 |
| 1994 | 1.49299 |
| 1993 | 1.43315 |
| 1992 | 1.38669 |
| 1991 | 1.34836 |
| 1990 | 1.31548 |
| 1989 | 1.29654 |
| 1988 | 1.28993 |
| 1987 | 1.27741 |
| 1986 | 1.25283 |
| 1985 | 1.2228 |
| 1984 | 1.18657 |
| 1983 | 1.14642 |
| 1982 | 1.11528 |
| 1981 | 1.09591 |
| 1980 | 1.07762 |
| 1979 | 1.05379 |
| 1978 | 1.03092 |
| 1977 | 1.01351 |
| 1976 | 0.995276 |
| 1975 | 0.972373 |
| 1974 | 0.944195 |
| 1973 | 0.913121 |
| 1972 | 0.886363 |
| 1971 | 0.865808 |
| 1970 | 0.854123 |
| 1969 | 0.856622 |
| 1968 | 0.865328 |
| 1967 | 0.870055 |
| 1966 | 0.871913 |
| 1965 | 0.873317 |
| 1964 | 0.879075 |
| 1963 | 0.893059 |
| 1962 | 0.908689 |
| 1961 | 0.929294 |
| 1960 | 0.965392 |