| 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 | 28.30 |
| 2009 | 26.90 |
| 2008 | 27.60 |
| 2007 | 31.60 |
| 2006 | 31.10 |
| 2005 | 32.90 |
| 2004 | 34.00 |
| 2003 | 30.20 |
| 2002 | 25.60 |
| 2001 | 25.40 |
| 2000 | 26.10 |
| 1999 | 27.60 |
| 1998 | 29.90 |
| 1997 | 32.10 |
| 1996 | 31.80 |
| 1995 | 33.10 |
| 1994 | 35.00 |
| 1993 | 35.40 |
| 1992 | 31.30 |
| 1991 | 32.90 |
| 1990 | 37.80 |
| 1989 | 36.90 |
| 1988 | 38.80 |
| 1987 | 44.40 |
| 1986 | 46.70 |
| 1985 | 48.70 |
| 1984 | 49.30 |
| 1983 | 52.60 |
| 1982 | 53.00 |
| 1981 | 54.40 |
| 1980 | 56.10 |
| 1979 | 56.40 |
| 1978 | 56.70 |
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