| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2026（E） | 购买后可见 » |
| 2025（E） | 购买后可见 » |
| 2024（E） | 购买后可见 » |
| 2023 | 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 | 58.36 |
| 2012 | 60.38 |
| 2011 | 62.28 |
| 2010 | 65.35 |
| 2009 | 59.58 |
| 2008 | 63.25 |
| 2007 | 63.87 |
| 2006 | 62.18 |
| 2005 | 60.85 |
| 2004 | 52.56 |
| 2003 | 70.11 |
| 2002 | 82.77 |
| 2001 | 49.57 |
| 2000 | 61.22 |
| 1999 | 47.18 |
| 1998 | 51.34 |
| 1997 | 50.96 |
| 1996 | 54.90 |
| 1995 | 54.21 |
| 1994 | 69.24 |
| 1993 | 58.23 |
| 1992 | 72.20 |
| 1991 | 69.80 |
| 1990 | 21.80 |
| 1989 | 22.00 |
| 1988 | 82.40 |
| 1987 | 24.20 |
| 1986 | 117.20 |
| 1985 | 47.60 |
| 1984 | 54.10 |
| 1983 | 22.40 |
| 1982 | 55.30 |
| 1981 | 6.90 |
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