| 序号 | 时间 (年) |
数据 (‰) |
|---|---|---|
| 1 | 2019 | |
| 2 | 2018 | |
| 3 | 2017 | |
| 4 | 2016 | |
| 5 | 2015 | |
| 6 | 2014 | |
| 7 | 2013 | 2.20 |
| 8 | 2011 | 3.50 |
| 9 | 2010 | 3.11 |
| 10 | 2009 | 2.54 |
| 11 | 2008 | 2.68 |
| 12 | 2007 | 2.41 |
| 13 | 2006 | 3.08 |
| 14 | 2005 | 4.51 |
| 15 | 2004 | 2.91 |
| 16 | 2003 | 4.12 |
| 17 | 2002 | 4.39 |
| 18 | 2001 | 5.03 |
| 19 | 2000 | 5.55 |
| 20 | 1999 | 5.43 |
| 21 | 1998 | 5.89 |
| 22 | 1997 | 5.95 |
| 23 | 1996 | 6.92 |
| 24 | 1995 | 8.22 |
| 25 | 1994 | 8.30 |
