| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 4.19621 |
| 2021 | 3.85291 |
| 2020 | 3.54339 |
| 2019 | 3.26265 |
| 2018 | 3.0449 |
| 2017 | 2.87389 |
| 2016 | 2.75522 |
| 2015 | 2.67078 |
| 2014 | 2.60696 |
| 2013 | 2.5654 |
| 2012 | 2.5436 |
| 2011 | 2.52234 |
| 2010 | 2.51091 |
| 2009 | 2.52129 |
| 2008 | 2.53518 |
| 2007 | 2.52557 |
| 2006 | 2.48433 |
| 2005 | 2.42614 |
| 2004 | 2.36191 |
| 2003 | 2.29277 |
| 2002 | 2.22929 |
| 2001 | 2.17338 |
| 2000 | 2.12301 |
| 1999 | 2.08512 |
| 1998 | 2.04299 |
| 1997 | 1.99161 |
| 1996 | 1.9548 |
| 1995 | 1.91726 |
| 1994 | 1.86155 |
| 1993 | 1.80399 |
| 1992 | 1.76226 |
| 1991 | 1.73255 |
| 1990 | 1.70603 |
| 1989 | 1.68861 |
| 1988 | 1.68123 |
| 1987 | 1.66395 |
| 1986 | 1.63043 |
| 1985 | 1.59523 |
| 1984 | 1.56359 |
| 1983 | 1.53502 |
| 1982 | 1.51966 |
| 1981 | 1.52062 |
| 1980 | 1.52308 |
| 1979 | 1.51269 |
| 1978 | 1.49678 |
| 1977 | 1.48519 |
| 1976 | 1.46915 |
| 1975 | 1.44069 |
| 1974 | 1.40078 |
| 1973 | 1.35593 |
| 1972 | 1.31755 |
| 1971 | 1.28813 |
| 1970 | 1.2713 |
| 1969 | 1.27576 |
| 1968 | 1.29288 |
| 1967 | 1.30632 |
| 1966 | 1.31153 |
| 1965 | 1.30942 |
| 1964 | 1.30803 |
| 1963 | 1.31653 |
| 1962 | 1.32814 |
| 1961 | 1.34501 |
| 1960 | 1.37997 |