| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2021（E） | 购买后可见 » |
| 2020（E） | 购买后可见 » |
| 2019（E） | 购买后可见 » |
| 2018 | 购买后可见 » |
| 2017 | 购买后可见 » |
| 2016 | 购买后可见 » |
| 2015 | 购买后可见 » |
| 2014 | 购买后可见 » |
| 2013 | 购买后可见 » |
| 2012 | 购买后可见 » |
| 2011 | 购买后可见 » |
| 2010 | 购买后可见 » |
| 2009 | 购买后可见 » |
| 2008 | 100.70 |
| 2007 | 99.60 |
| 2006 | 99.20 |
| 2005 | 98.30 |
| 2004 | 102.20 |
| 2003 | 101.20 |
| 2002 | 100.60 |
| 2001 | 98.30 |
| 2000 | 96.20 |
| 1999 | 93.30 |
| 1998 | 92.40 |
| 1997 | 92.00 |
| 1996 | 89.20 |
| 1995 | 86.00 |
| 1994 | 83.50 |
| 1993 | 79.10 |
| 1992 | 76.00 |
| 1991 | 74.20 |
| 1990 | 72.40 |
| 1989 | 70.90 |
| 1988 | 69.40 |
| 1987 | 69.20 |
| 1986 | 69.70 |
| 1985 | 69.80 |
| 1984 | 70.10 |
| 1983 | 70.20 |
| 1982 | 70.20 |
| 1981 | 70.50 |
| 1980 | 71.20 |
| 1979 | 72.00 |
| 1978 | 72.50 |
| 1977 | 72.60 |
| 1976 | 73.30 |
| 1975 | 74.40 |
| 1974 | 74.80 |
| 1973 | 75.50 |
| 1972 | 76.30 |
| 1971 | 77.30 |
| 1970 | 78.20 |
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