| 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 | 18.05 |
| 2016 | 17.56 |
| 2015 | 17.11 |
| 2014 | 16.96 |
| 2013 | 16.89 |
| 2012 | 17.79 |
| 2011 | 20.47 |
| 2010 | 20.58 |
| 2009 | 19.51 |
| 2008 | 21.78 |
| 2007 | 22.25 |
| 2006 | 21.96 |
| 2005 | 20.89 |
| 2004 | 21.00 |
| 2003 | 20.88 |
| 2002 | 21.32 |
| 2001 | 20.72 |
| 2000 | 20.83 |
| 1999 | 20.39 |
| 1998 | 19.86 |
| 1997 | 19.74 |
| 1996 | 19.38 |
| 1995 | 20.60 |
| 1994 | 19.08 |
| 1993 | 19.01 |
| 1992 | 21.74 |
| 1991 | 22.36 |
| 1990 | 22.61 |
| 1989 | 22.52 |
| 1988 | 23.01 |
| 1987 | 22.53 |
| 1986 | 21.86 |
| 1985 | 23.78 |
| 1984 | 23.72 |
| 1983 | 21.72 |
| 1982 | 23.31 |
| 1981 | 23.86 |
| 1980 | 27.59 |
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