| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0.5%
|
|
| 2009 | 2 |
1%
|
|
| 2010 | 9 |
4.7%
|
|
| 2011 | 23 |
12%
|
|
| 2012 | 111 |
57.8%
|
|
| 2013 | 46 |
24%
|
|
| Sysmiss | 53 |