| 年份 | 中国 |
|---|---|
| 2023 | - |
| 2022 | -2.84848 |
| 2021 | -2.76132 |
| 2020 | -2.62426 |
| 2019 | -2.51608 |
| 2018 | -2.4087 |
| 2017 | -2.26469 |
| 2016 | -2.24378 |
| 2015 | -2.16913 |
| 2014 | -2.05727 |
| 2013 | -1.95532 |
| 2012 | -1.88821 |
| 2011 | -2.01694 |
| 2010 | -2.13347 |
| 2009 | -2.04298 |
| 2008 | -1.96322 |
| 2007 | -1.87749 |
| 2006 | -1.81125 |
| 2005 | -1.78103 |
| 2004 | -1.70378 |
| 2003 | -1.59564 |
| 2002 | -1.47015 |
| 2001 | -1.18819 |
| 2000 | -0.777936 |
| 1999 | -0.654731 |
| 1998 | -0.517399 |
| 1997 | -0.407037 |
| 1996 | -0.344791 |
| 1995 | -0.261567 |
| 1994 | -0.177319 |
| 1993 | -0.116016 |
| 1992 | -0.00364702 |
| 1991 | 0.174644 |
| 1990 | 0.464975 |
| 1989 | 0.559447 |
| 1988 | 0.661581 |
| 1987 | 0.683647 |
| 1986 | 0.595274 |
| 1985 | 0.495457 |
| 1984 | 0.469835 |
| 1983 | 0.628712 |
| 1982 | 0.486379 |
| 1981 | 0.334046 |
| 1980 | 0.339541 |
| 1979 | 0.456767 |
| 1978 | 0.8764 |
| 1977 | 1.29006 |
| 1976 | 1.47467 |
| 1975 | 1.63573 |
| 1974 | 1.93546 |
| 1973 | 2.2834 |
| 1972 | 2.58785 |
| 1971 | 2.87758 |
| 1970 | 2.91676 |
| 1969 | 2.89533 |
| 1968 | 2.76769 |
| 1967 | 2.72894 |
| 1966 | 2.99587 |
| 1965 | 2.64174 |
| 1964 | 1.65948 |
| 1963 | 1.81408 |
| 1962 | 0.196605 |
| 1961 | -1.62 |
| 1960 | - |