| 年份 | 单位:% |
| 含“(E)”其对应值为系统预测,仅供参考。 | |
| 2025(E) | 购买后可见 » |
| 2024(E) | 购买后可见 » |
| 2023(E) | 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 | 购买后可见 » |
| 2012 | 57.64 |
| 2011 | 56.91 |
| 2010 | 54.36 |
| 2009 | 54.00 |
| 2008 | 51.91 |
| 2007 | 49.53 |
| 2006 | 48.03 |
| 2005 | 47.41 |
| 2004 | 43.35 |
| 2003 | 41.33 |
| 2002 | 40.38 |
| 2001 | 42.16 |
| 2000 | 44.54 |
| 1999 | 47.67 |
| 1998 | 47.70 |
| 1997 | 46.50 |
| 1996 | 44.83 |
| 1995 | 43.03 |
| 1994 | 40.43 |
| 1993 | 40.16 |
| 1992 | 37.17 |
| 1991 | 35.90 |
| 1990 | 37.34 |
| 1989 | 35.89 |
| 1988 | 34.56 |
| 1987 | 33.83 |
| 1986 | 37.28 |
| 1985 | 39.55 |
| 1984 | 34.51 |
| 1983 | 31.81 |
| 1982 | 29.41 |
| 1981 | 22.80 |
| 1980 | 29.12 |
| 1979 | 33.93 |
| 1978 | 35.10 |
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