| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2025（E） | 购买后可见 » |
| 2024（E） | 购买后可见 » |
| 2023（E） | 购买后可见 » |
| 2022 | 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 | 98.20 |
| 2011 | 96.60 |
| 2010 | 94.90 |
| 2009 | 93.00 |
| 2008 | 89.60 |
| 2007 | 85.60 |
| 2006 | 79.20 |
| 2005 | 76.60 |
| 2004 | 74.40 |
| 2003 | 70.60 |
| 2002 | 70.50 |
| 2001 | 65.60 |
| 2000 | 65.00 |
| 1999 | 63.20 |
| 1998 | 63.30 |
| 1997 | 65.40 |
| 1996 | 69.10 |
| 1995 | 70.80 |
| 1994 | 72.60 |
| 1993 | 76.30 |
| 1992 | 83.70 |
| 1991 | 86.20 |
| 1990 | 85.70 |
| 1989 | 86.10 |
| 1988 | 89.70 |
| 1987 | 89.50 |
| 1986 | 87.30 |
| 1985 | 87.00 |
| 1984 | 86.80 |
| 1983 | 89.60 |
| 1982 | 88.10 |
| 1981 | 85.40 |
| 1980 | 84.20 |
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