| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 456 |
0.5%
|
|
| 1998 | 152 |
0.2%
|
|
| 1999 | 542 |
0.6%
|
|
| 2000 | 1638 |
1.8%
|
|
| 2001 | 152 |
0.2%
|
|
| 2002 | 2807 |
3.2%
|
|
| 2003 | 2773 |
3.1%
|
|
| 2004 | 912 |
1%
|
|
| 2005 | 6334 |
7.1%
|
|
| 2006 | 13160 |
14.8%
|
|
| 2007 | 22227 |
25%
|
|
| 2008 | 6902 |
7.7%
|
|
| 2009 | 7729 |
8.7%
|
|
| 2010 | 6140 |
6.9%
|
|
| 2011 | 5729 |
6.4%
|
|
| 2012 | 3567 |
4%
|
|
| 2013 | 1545 |
1.7%
|
|
| 2014 | 2380 |
2.7%
|
|
| 2015 | 3932 |
4.4%
|
|
| 2016 | 2 |
0%
|
|
| Sysmiss | 175713 |