| 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 | 36.93 |
| 12 | 2008 | 30.78 |
| 13 | 2007 | 31.78 |
| 14 | 2006 | 27.57 |
| 15 | 2005 | 33.58 |
| 16 | 2004 | 30.94 |
| 17 | 2003 | 27.14 |
| 18 | 2002 | 30.62 |
| 19 | 2001 | 32.01 |
| 20 | 2000 | 32.17 |
| 21 | 1999 | 33.78 |
| 22 | 1998 | 35.01 |
| 23 | 1997 | 37.66 |
| 24 | 1996 | 36.44 |
| 25 | 1995 | 30.57 |
| 26 | 1994 | 30.10 |
| 27 | 1993 | 34.65 |
| 28 | 1992 | 33.90 |
| 29 | 1991 | 35.29 |
| 30 | 1990 | 35.16 |
| 31 | 1989 | 34.06 |
| 32 | 1988 | 31.07 |
| 33 | 1987 | 33.05 |
| 34 | 1986 | 36.11 |
| 35 | 1985 | 33.83 |
| 36 | 1984 | 32.61 |
| 37 | 1983 | 30.34 |
| 38 | 1982 | 32.46 |
| 39 | 1981 | 33.00 |
| 40 | 1980 | 32.38 |
| 41 | 1979 | 35.02 |
| 42 | 1978 | 32.52 |
| 43 | 1977 | 33.00 |
| 44 | 1976 | 23.18 |
| 45 | 1975 | 23.69 |
| 46 | 1974 | 31.31 |
| 47 | 1973 | 21.39 |
