| 年份 | 单位:% |
| 含“(E)”其对应值为系统预测,仅供参考。 | |
| 2018(E) | 购买后可见 » |
| 2017(E) | 购买后可见 » |
| 2016(E) | 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 | 购买后可见 » |
| 2009 | 购买后可见 » |
| 2008 | 购买后可见 » |
| 2007 | 购买后可见 » |
| 2006 | 购买后可见 » |
| 2005 | 2.15 |
| 2004 | 2.07 |
| 2003 | 2.05 |
| 2002 | 1.40 |
| 2001 | 1.24 |
| 2000 | 1.69 |
| 1999 | 1.97 |
| 1998 | 1.65 |
| 1997 | 1.76 |
| 1996 | 1.99 |
| 1995 | 1.73 |
| 1994 | 1.38 |
| 1993 | 1.27 |
| 1992 | 1.19 |
| 1991 | 1.54 |
| 1990 | 0.99 |
| 1989 | 1.02 |
| 1988 | 1.07 |
| 1987 | 1.34 |
| 1986 | 1.67 |
| 1985 | 1.37 |
| 1984 | 1.51 |
| 1983 | 1.28 |
| 1982 | 2.04 |
| 1981 | 2.00 |
| 1980 | 1.96 |
| 1979 | 2.01 |
| 1978 | 1.79 |
| 1977 | 1.21 |
| 1976 | 1.27 |
| 1975 | 1.48 |
| 1974 | 1.79 |
| 1973 | 1.62 |
| 1972 | 2.28 |
| 1971 | 2.63 |
| 1970 | 2.95 |
| 1969 | 2.78 |
| 1968 | 2.06 |
| 1967 | 2.71 |
| 1966 | 3.16 |
| 1965 | 1.68 |
| 1964 | 1.84 |
| 1963 | 2.34 |
| 1962 | 1.88 |
| 1961 | 1.85 |
| 1960 | 1.66 |
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