| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2023（E） | 购买后可见 » |
| 2022（E） | 购买后可见 » |
| 2021（E） | 购买后可见 » |
| 2020 | 购买后可见 » |
| 2019 | 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 | 98.70 |
| 2009 | 99.10 |
| 2008 | 99.70 |
| 2007 | 99.90 |
| 2006 | 100.00 |
| 2005 | 98.40 |
| 2004 | 98.11 |
| 2003 | 97.90 |
| 2002 | 97.00 |
| 2001 | 95.45 |
| 2000 | 94.90 |
| 1999 | 94.40 |
| 1998 | 94.30 |
| 1997 | 93.70 |
| 1996 | 92.60 |
| 1995 | 90.80 |
| 1994 | 86.60 |
| 1993 | 81.80 |
| 1992 | 79.70 |
| 1991 | 77.70 |
| 1990 | 74.60 |
| 1989 | 71.50 |
| 1988 | 70.40 |
| 1987 | 69.10 |
| 1986 | 69.50 |
| 1985 | 68.40 |
| 1984 | 66.20 |
| 1983 | 67.30 |
| 1982 | 66.20 |
| 1981 | 68.30 |
| 1980 | 75.90 |
| 1979 | 82.80 |
| 1978 | 87.70 |
| 1975 | 90.60 |
| 1971 | 89.70 |
| 1970 | 71.20 |
| 1965 | 82.50 |
| 1962 | 45.30 |
| 1957 | 44.20 |
| 1952 | 96.00 |
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