| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2015 | 6 |
0.6%
|
| 2 | 2014 | 11 |
1.1%
|
| 3 | 2013 | 17 |
1.7%
|
| 4 | 2012 | 12 |
1.2%
|
| 5 | 2011 | 12 |
1.2%
|
| 6 | 2010 | 9 |
0.9%
|
| 7 | 2009 | 4 |
0.4%
|
| Sysmiss | 940 |
93%
|