| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 15 |
0.7%
|
|
| 2009 | 17 |
0.8%
|
|
| 2010 | 80 |
3.8%
|
|
| 2011 | 128 |
6.1%
|
|
| 2012 | 366 |
17.3%
|
|
| 2013 | 602 |
28.5%
|
|
| 2014 | 906 |
42.9%
|
|
| Sysmiss | 143 |