| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2015 | 15 |
1.5%
|
| 2 | 2014 | 26 |
2.6%
|
| 3 | 2013 | 54 |
5.3%
|
| 4 | 2012 | 51 |
5%
|
| 5 | 2011 | 42 |
4.2%
|
| 6 | 2010 | 39 |
3.9%
|
| 7 | 2009 | 16 |
1.6%
|
| Sysmiss | 768 |
76%
|