| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2013 | |
| 2 | 2012 | |
| 3 | 2011 | |
| 4 | 2010 | |
| 5 | 2009 | |
| 6 | 2008 | |
| 7 | 2007 | 2.00 |
| 8 | 2006 | 2.10 |
| 9 | 2005 | 1.60 |
| 10 | 2004 | 2.20 |
| 11 | 2003 | 2.50 |
| 12 | 2002 | 1.70 |
| 13 | 2001 | 1.90 |
| 14 | 2000 | 2.50 |
| 15 | 1999 | 3.10 |
| 16 | 1998 | 2.10 |
| 17 | 1997 | 2.30 |
