| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 5 |
8.2%
|
|
| 2009 | 15 |
24.6%
|
|
| 2010 | 11 |
18%
|
|
| 2011 | 7 |
11.5%
|
|
| 2012 | 4 |
6.6%
|
|
| 2013 | 10 |
16.4%
|
|
| 2014 | 4 |
6.6%
|
|
| 2015 | 5 |
8.2%
|
|
| Sysmiss | 171 |