| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 2006 | 1 |
0.3%
|
| 2007 | 2007 | 0 |
0%
|
| 2008 | 2008 | 0 |
0%
|
| 2009 | 2009 | 78 |
24%
|
| 2010 | 2010 | 154 |
47.4%
|
| 2011 | 2011 | 92 |
28.3%
|
| Sysmiss | 7077 |