| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1 |
0.1%
|
|
| 2010 | 2 |
0.2%
|
|
| 2011 | 3 |
0.3%
|
|
| 2012 | 153 |
13.6%
|
|
| 2013 | 620 |
55.3%
|
|
| 2014 | 342 |
30.5%
|
|
| Sysmiss | 1443 |