| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 1 |
0.5%
|
|
| 2009 | 18 |
8.3%
|
|
| 2010 | 25 |
11.5%
|
|
| 2011 | 64 |
29.5%
|
|
| 2012 | 77 |
35.5%
|
|
| 2013 | 32 |
14.7%
|
|
| Sysmiss | 770 |