| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 1 |
1.4%
|
|
| 1997 | 1 |
1.4%
|
|
| 2009 | 1 |
1.4%
|
|
| 2012 | 1 |
1.4%
|
|
| 2013 | 17 |
23.3%
|
|
| 2014 | 52 |
71.2%
|
|
| Sysmiss | 12247 |