| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2027（E） | 购买后可见 » |
| 2026（E） | 购买后可见 » |
| 2025（E） | 购买后可见 » |
| 2024 | 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 | 51.23 |
| 2013 | 51.24 |
| 2012 | 51.25 |
| 2011 | 51.26 |
| 2010 | 51.27 |
| 2009 | 51.44 |
| 2008 | 51.47 |
| 2007 | 51.50 |
| 2006 | 51.52 |
| 2005 | 51.53 |
| 2004 | 51.52 |
| 2003 | 51.50 |
| 2002 | 51.47 |
| 2001 | 51.46 |
| 2000 | 51.63 |
| 1999 | 51.43 |
| 1998 | 51.25 |
| 1997 | 51.07 |
| 1996 | 50.82 |
| 1995 | 51.03 |
| 1994 | 51.10 |
| 1993 | 51.02 |
| 1992 | 51.05 |
| 1991 | 51.34 |
| 1990 | 51.52 |
| 1989 | 51.55 |
| 1988 | 51.52 |
| 1987 | 51.50 |
| 1986 | 51.70 |
| 1985 | 51.70 |
| 1984 | 51.60 |
| 1983 | 51.60 |
| 1982 | 51.50 |
| 1981 | 51.48 |
| 1980 | 51.45 |
| 1979 | 51.46 |
| 1978 | 51.49 |
| 1977 | 51.50 |
| 1976 | 51.49 |
| 1975 | 51.47 |
| 1974 | 51.43 |
| 1973 | 51.42 |
| 1972 | 51.40 |
| 1971 | 51.41 |
| 1970 | 51.43 |
| 1965 | 51.18 |
| 1962 | 51.29 |
| 1960 | 51.78 |
| 1957 | 51.77 |
| 1955 | 51.75 |
| 1952 | 51.90 |
| 1951 | 51.92 |
| 1950 | 51.94 |
| 1949 | 51.96 |
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