| 年份 | 单位:% |
| 含“(E)”其对应值为系统预测,仅供参考。 | |
| 2030(E) | 购买后可见 » |
| 2029(E) | 购买后可见 » |
| 2028(E) | 购买后可见 » |
| 2027 | 购买后可见 » |
| 2026 | 购买后可见 » |
| 2025 | 购买后可见 » |
| 2024 | 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 | 20.96 |
| 2016 | 19.97 |
| 2015 | 19.74 |
| 2014 | 20.37 |
| 2013 | 20.05 |
| 2012 | 19.72 |
| 2011 | 21.64 |
| 2010 | 20.07 |
| 2009 | 18.56 |
| 2008 | 21.45 |
| 2007 | 21.38 |
| 2006 | 20.57 |
| 2005 | 17.27 |
| 2004 | 17.63 |
| 2003 | 17.85 |
| 2002 | 18.07 |
| 2001 | 20.35 |
| 2000 | 22.30 |
| 1999 | 21.80 |
| 1998 | 21.85 |
| 1997 | 21.33 |
| 1996 | 21.28 |
| 1995 | 22.34 |
| 1994 | 22.46 |
| 1993 | 22.16 |
| 1992 | 23.49 |
| 1991 | 24.04 |
| 1990 | 25.64 |
| 1989 | 24.81 |
| 1988 | 23.89 |
| 1987 | 23.04 |
| 1986 | 23.52 |
| 1985 | 23.48 |
| 1984 | 24.52 |
| 1983 | 24.74 |
| 1982 | 23.69 |
| 1981 | 25.43 |
| 1980 | 28.16 |
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