| 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 | 99.70 |
| 2009 | 99.40 |
| 2008 | 99.50 |
| 2007 | 99.50 |
| 2006 | 99.30 |
| 2005 | 99.15 |
| 2004 | 98.90 |
| 2003 | 98.70 |
| 2002 | 98.60 |
| 2001 | 99.10 |
| 2000 | 99.10 |
| 1999 | 99.10 |
| 1998 | 98.90 |
| 1997 | 98.90 |
| 1996 | 98.80 |
| 1995 | 98.50 |
| 1994 | 98.40 |
| 1993 | 97.70 |
| 1992 | 97.20 |
| 1991 | 97.80 |
| 1990 | 97.80 |
| 1989 | 97.40 |
| 1988 | 97.20 |
| 1987 | 97.20 |
| 1986 | 96.40 |
| 1985 | 96.00 |
| 1984 | 95.30 |
| 1983 | 94.00 |
| 1982 | 93.20 |
| 1981 | 93.00 |
| 1980 | 93.90 |
| 1979 | 93.00 |
| 1978 | 95.50 |
| 1977 | 96.50 |
| 1976 | 97.10 |
| 1975 | 96.80 |
| 1974 | 93.00 |
| 1965 | 84.70 |
| 1964 | 71.10 |
| 1963 | 57.00 |
| 1962 | 56.10 |
| 1961 | 63.40 |
| 1960 | 76.40 |
| 1959 | 79.30 |
| 1958 | 80.30 |
| 1957 | 61.70 |
| 1956 | 62.80 |
| 1955 | 53.80 |
| 1954 | 51.50 |
| 1953 | 50.30 |
| 1952 | 49.20 |
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