| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 201 |
9.4%
|
|
| 2012 | 587 |
27.6%
|
|
| 2013 | 660 |
31%
|
|
| 2014 | 680 |
32%
|
|
| Sysmiss | 23246 |