| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 |
0.7%
|
|
| 2006 | 1 |
0.7%
|
|
| 2007 | 2 |
1.4%
|
|
| 2008 | 5 |
3.4%
|
|
| 2009 | 6 |
4.1%
|
|
| 2010 | 22 |
15.2%
|
|
| 2011 | 28 |
19.3%
|
|
| 2012 | 32 |
22.1%
|
|
| 2013 | 36 |
24.8%
|
|
| 2014 | 12 |
8.3%
|
|
| Sysmiss | 5630 |