| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 25 |
1%
|
|
| 2006 | 31 |
1.2%
|
|
| 2007 | 72 |
2.8%
|
|
| 2008 | 194 |
7.6%
|
|
| 2009 | 557 |
21.8%
|
|
| 2010 | 924 |
36.2%
|
|
| 2011 | 610 |
23.9%
|
|
| 2012 | 132 |
5.2%
|
|
| 2013 | 6 |
0.2%
|
|
| Sysmiss | 236 |