| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1 |
10%
|
|
| 2010 | 3 |
30%
|
|
| 2011 | 1 |
10%
|
|
| 2012 | 4 |
40%
|
|
| 2013 | 1 |
10%
|
|
| Sysmiss | 1424 |