| 年份 | 单位:% |
| 含“(E)”其对应值为系统预测,仅供参考。 | |
| 2023(E) | 购买后可见 » |
| 2022(E) | 购买后可见 » |
| 2021(E) | 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 | 购买后可见 » |
| 2010 | 36.19 |
| 2009 | 35.95 |
| 2008 | 36.13 |
| 2007 | 35.45 |
| 2006 | 35.23 |
| 2005 | 32.95 |
| 2004 | 32.60 |
| 2003 | 31.66 |
| 2002 | 30.48 |
| 2001 | 29.91 |
| 2000 | 28.54 |
| 1999 | 29.42 |
| 1998 | 27.45 |
| 1997 | 26.38 |
| 1996 | 25.38 |
| 1995 | 24.21 |
| 1994 | 23.22 |
| 1993 | 22.18 |
| 1992 | 23.04 |
| 1991 | 21.78 |
| 1990 | 21.34 |
| 1989 | 21.51 |
| 1988 | 20.93 |
| 1987 | 21.08 |
| 1986 | 20.30 |
| 1985 | 19.96 |
| 1980 | 15.15 |
| 1978 | 13.61 |
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