| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2017 | |
| 2 | 2016 | |
| 3 | 2014 | |
| 4 | 2013 | |
| 5 | 2012 | |
| 6 | 2011 | |
| 7 | 2010 | |
| 8 | 2009 | |
| 9 | 2008 | |
| 10 | 2007 | |
| 11 | 2006 | 3.87 |
| 12 | 2005 | 0.71 |
| 13 | 2004 | 0.39 |
| 14 | 1994 | 0.07 |
| 15 | 1993 | 0.08 |
| 16 | 1992 | 0.45 |
| 17 | 1991 | 0.06 |
| 18 | 1990 | 0.08 |
| 19 | 1989 | 0.17 |
| 20 | 1988 | 0.06 |
| 21 | 1987 | 0.26 |
| 22 | 1986 | 0.47 |
| 23 | 1985 | 0.36 |
| 24 | 1984 | 0.73 |
| 25 | 1983 | 0.94 |
| 26 | 1982 | 2.53 |
| 27 | 1981 | 1.38 |
| 28 | 1980 | 1.31 |
| 29 | 1979 | 0.58 |
| 30 | 1978 | 0.70 |
