| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 3 |
1.3%
|
|
| 2010 | 203 |
87.1%
|
|
| 2011 | 25 |
10.7%
|
|
| 2012 | 2 |
0.9%
|
|
| Sysmiss | 3051 |