| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2026（E） | 购买后可见 » |
| 2025（E） | 购买后可见 » |
| 2024（E） | 购买后可见 » |
| 2023 | 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 | 53.73 |
| 2012 | 52.57 |
| 2011 | 51.27 |
| 2010 | 49.95 |
| 2009 | 48.34 |
| 2008 | 46.99 |
| 2007 | 45.89 |
| 2006 | 44.34 |
| 2005 | 42.99 |
| 2004 | 41.76 |
| 2003 | 40.53 |
| 2002 | 39.09 |
| 2001 | 37.66 |
| 2000 | 36.22 |
| 1999 | 34.78 |
| 1998 | 33.35 |
| 1997 | 31.91 |
| 1996 | 30.48 |
| 1995 | 29.04 |
| 1994 | 28.51 |
| 1993 | 27.99 |
| 1992 | 27.46 |
| 1991 | 26.94 |
| 1990 | 26.41 |
| 1989 | 26.21 |
| 1988 | 25.81 |
| 1987 | 25.32 |
| 1986 | 24.52 |
| 1985 | 23.71 |
| 1984 | 23.01 |
| 1983 | 21.62 |
| 1982 | 21.13 |
| 1981 | 20.16 |
| 1980 | 19.39 |
| 1979 | 18.96 |
| 1978 | 17.92 |
| 1977 | 17.55 |
| 1976 | 17.44 |
| 1975 | 17.34 |
| 1974 | 17.16 |
| 1973 | 17.20 |
| 1972 | 17.13 |
| 1971 | 17.26 |
| 1970 | 17.38 |
| 1965 | 17.98 |
| 1962 | 17.33 |
| 1960 | 19.75 |
| 1957 | 15.39 |
| 1955 | 13.48 |
| 1952 | 12.46 |
| 1951 | 11.78 |
| 1950 | 11.18 |
| 1949 | 10.64 |
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