| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 2007 | 0 |
0%
|
| 2008 | 2008 | 3 |
2.3%
|
| 2009 | 2009 | 0 |
0%
|
| 2010 | 2010 | 4 |
3%
|
| 2011 | 2011 | 52 |
39.1%
|
| 2012 | 2012 | 74 |
55.6%
|
| Sysmiss | 9767 |