| 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 | 87.50 |
| 2009 | 85.60 |
| 2008 | 82.10 |
| 2007 | 80.50 |
| 2006 | 75.70 |
| 2005 | 69.70 |
| 2004 | 62.91 |
| 2003 | 59.60 |
| 2002 | 58.30 |
| 2001 | 52.95 |
| 2000 | 51.20 |
| 1999 | 50.00 |
| 1998 | 50.70 |
| 1997 | 51.50 |
| 1996 | 49.80 |
| 1995 | 50.30 |
| 1994 | 47.80 |
| 1993 | 44.10 |
| 1992 | 43.60 |
| 1991 | 42.60 |
| 1990 | 40.60 |
| 1989 | 38.30 |
| 1988 | 38.00 |
| 1987 | 39.10 |
| 1986 | 40.60 |
| 1985 | 41.70 |
| 1984 | 38.40 |
| 1983 | 35.50 |
| 1982 | 32.30 |
| 1981 | 31.50 |
| 1980 | 45.90 |
| 1979 | 40.00 |
| 1978 | 40.90 |
| 1975 | 60.40 |
| 1971 | 38.50 |
| 1970 | 38.60 |
| 1965 | 70.00 |
| 1962 | 30.00 |
| 1957 | 39.70 |
| 1952 | 168.60 |
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