| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | 5.96523 |
| 2021 | 5.89215 |
| 2020 | 5.88024 |
| 2019 | 5.90042 |
| 2018 | 5.93004 |
| 2017 | 6.00151 |
| 2016 | 6.10969 |
| 2015 | 6.22644 |
| 2014 | 6.3839 |
| 2013 | 6.60548 |
| 2012 | 6.86009 |
| 2011 | 7.16768 |
| 2010 | 7.6802 |
| 2009 | 8.31301 |
| 2008 | 8.84305 |
| 2007 | 9.33456 |
| 2006 | 9.72826 |
| 2005 | 9.74014 |
| 2004 | 9.47306 |
| 2003 | 9.1849 |
| 2002 | 8.93832 |
| 2001 | 8.73638 |
| 2000 | 8.56384 |
| 1999 | 8.44785 |
| 1998 | 8.35131 |
| 1997 | 8.15367 |
| 1996 | 7.98017 |
| 1995 | 8.01244 |
| 1994 | 8.24802 |
| 1993 | 8.7301 |
| 1992 | 9.3713 |
| 1991 | 10.0442 |
| 1990 | 10.7642 |
| 1989 | 11.4164 |
| 1988 | 11.8931 |
| 1987 | 12.1379 |
| 1986 | 12.211 |
| 1985 | 12.2534 |
| 1984 | 12.2674 |
| 1983 | 12.3989 |
| 1982 | 12.5537 |
| 1981 | 12.1143 |
| 1980 | 11.1351 |
| 1979 | 10.1482 |
| 1978 | 9.18054 |
| 1977 | 8.65368 |
| 1976 | 8.94567 |
| 1975 | 9.65862 |
| 1974 | 10.3978 |
| 1973 | 10.9124 |
| 1972 | 11.1128 |
| 1971 | 11.182 |
| 1970 | 11.1591 |
| 1969 | 10.9769 |
| 1968 | 10.7159 |
| 1967 | 10.3317 |
| 1966 | 9.91216 |
| 1965 | 9.5464 |
| 1964 | 9.20273 |
| 1963 | 8.97691 |
| 1962 | 8.79996 |
| 1961 | 8.6375 |
| 1960 | 8.51673 |