| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2019 | |
| 2 | 2018 | |
| 3 | 2017 | |
| 4 | 2016 | |
| 5 | 2015 | |
| 6 | 2014 | |
| 7 | 2013 | |
| 8 | 2012 | |
| 9 | 2011 | |
| 10 | 2010 | |
| 11 | 2009 | 37.35 |
| 12 | 2008 | 34.52 |
| 13 | 2007 | 39.23 |
| 14 | 2006 | 40.99 |
| 15 | 2005 | 41.68 |
| 16 | 2004 | 41.07 |
| 17 | 2003 | 39.39 |
| 18 | 2002 | 39.35 |
| 19 | 2001 | 39.02 |
| 20 | 2000 | 38.44 |
| 21 | 1999 | 38.73 |
| 22 | 1998 | 37.11 |
| 23 | 1997 | 37.48 |
| 24 | 1996 | 37.58 |
| 25 | 1995 | 38.85 |
| 26 | 1994 | 32.98 |
| 27 | 1993 | 31.95 |
| 28 | 1992 | 30.44 |
| 29 | 1991 | 29.76 |
| 30 | 1990 | 28.26 |
| 31 | 1989 | 30.12 |
| 32 | 1988 | 31.54 |
| 33 | 1987 | 30.98 |
| 34 | 1986 | 29.42 |
| 35 | 1985 | 31.20 |
| 36 | 1984 | 29.21 |
| 37 | 1983 | 31.83 |
| 38 | 1982 | 32.26 |
| 39 | 1981 | 30.04 |
| 40 | 1980 | 32.02 |
| 41 | 1979 | 31.59 |
| 42 | 1978 | 27.17 |
| 43 | 1977 | 24.24 |
| 44 | 1976 | 20.92 |
| 45 | 1975 | 17.95 |
| 46 | 1974 | 19.39 |
| 47 | 1973 | 22.36 |
| 48 | 1972 | 26.25 |
| 49 | 1971 | 24.63 |
| 50 | 1970 | 22.89 |
| 51 | 1969 | 24.68 |
| 52 | 1968 | 25.58 |
| 53 | 1967 | 27.85 |
| 54 | 1966 | 27.16 |
| 55 | 1965 | 28.59 |
| 56 | 1964 | 28.62 |
| 57 | 1963 | 29.57 |
| 58 | 1962 | 24.81 |
| 59 | 1961 | 23.59 |
| 60 | 1960 | 23.16 |
