| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 5.30767 |
| 2021 | 5.39265 |
| 2020 | 5.49002 |
| 2019 | 5.63249 |
| 2018 | 5.84029 |
| 2017 | 6.08695 |
| 2016 | 6.39135 |
| 2015 | 6.88761 |
| 2014 | 7.49805 |
| 2013 | 8.02044 |
| 2012 | 8.5151 |
| 2011 | 8.92436 |
| 2010 | 8.98181 |
| 2009 | 8.78287 |
| 2008 | 8.55968 |
| 2007 | 8.36892 |
| 2006 | 8.2108 |
| 2005 | 8.0674 |
| 2004 | 7.96875 |
| 2003 | 7.88381 |
| 2002 | 7.69737 |
| 2001 | 7.52938 |
| 2000 | 7.55272 |
| 1999 | 7.76234 |
| 1998 | 8.19686 |
| 1997 | 8.77318 |
| 1996 | 9.36813 |
| 1995 | 9.97814 |
| 1994 | 10.5011 |
| 1993 | 10.8681 |
| 1992 | 11.0238 |
| 1991 | 11.0311 |
| 1990 | 11.0557 |
| 1989 | 11.0909 |
| 1988 | 11.2379 |
| 1987 | 11.3998 |
| 1986 | 11.016 |
| 1985 | 10.1388 |
| 1984 | 9.24573 |
| 1983 | 8.36536 |
| 1982 | 7.89767 |
| 1981 | 8.17916 |
| 1980 | 8.83094 |
| 1979 | 9.48837 |
| 1978 | 9.91071 |
| 1977 | 10.0254 |
| 1976 | 10.0127 |
| 1975 | 9.90776 |
| 1974 | 9.65524 |
| 1973 | 9.32479 |
| 1972 | 8.88401 |
| 1971 | 8.42115 |
| 1970 | 8.01415 |
| 1969 | 7.63302 |
| 1968 | 7.34868 |
| 1967 | 7.13399 |
| 1966 | 7.02903 |
| 1965 | 7.02594 |
| 1964 | 7.07841 |
| 1963 | 7.21116 |
| 1962 | 7.39787 |
| 1961 | 7.49562 |
| 1960 | 7.547 |