| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2018 | |
| 2 | 2017 | |
| 3 | 2016 | |
| 4 | 2015 | |
| 5 | 2014 | |
| 6 | 2013 | |
| 7 | 2012 | 2.16 |
| 8 | 2011 | 1.98 |
| 9 | 2010 | 2.31 |
| 10 | 2009 | 2.27 |
| 11 | 2008 | 2.16 |
| 12 | 2007 | 2.30 |
| 13 | 2006 | 1.94 |
| 14 | 2005 | 1.78 |
| 15 | 2004 | 2.01 |
| 16 | 2003 | 2.13 |
| 17 | 1994 | 2.65 |
| 18 | 1993 | 2.26 |
| 19 | 1992 | 3.37 |
| 20 | 1991 | 5.60 |
| 21 | 1990 | 7.91 |
| 22 | 1989 | 7.29 |
| 23 | 1988 | 7.10 |
| 24 | 1987 | 3.95 |
