| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2024（E） | 购买后可见 » |
| 2023（E） | 购买后可见 » |
| 2022（E） | 购买后可见 » |
| 2021 | 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 | 88.50 |
| 2010 | 86.70 |
| 2009 | 84.70 |
| 2008 | 81.50 |
| 2007 | 78.20 |
| 2006 | 72.40 |
| 2005 | 70.30 |
| 2004 | 68.40 |
| 2003 | 65.30 |
| 2002 | 64.60 |
| 2001 | 61.10 |
| 2000 | 60.60 |
| 1999 | 59.60 |
| 1998 | 60.00 |
| 1997 | 61.50 |
| 1996 | 64.40 |
| 1995 | 66.90 |
| 1994 | 68.80 |
| 1993 | 70.90 |
| 1992 | 78.40 |
| 1991 | 81.20 |
| 1990 | 80.70 |
| 1989 | 81.50 |
| 1988 | 84.40 |
| 1987 | 84.30 |
| 1986 | 82.70 |
| 1985 | 82.70 |
| 1984 | 82.80 |
| 1983 | 84.80 |
| 1982 | 84.00 |
| 1981 | 83.30 |
| 1980 | 82.50 |
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