| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
4.3%
|
|
| 2005 | 2 |
8.7%
|
|
| 2006 | 1 |
4.3%
|
|
| 2008 | 1 |
4.3%
|
|
| 2009 | 5 |
21.7%
|
|
| 2010 | 10 |
43.5%
|
|
| 2011 | 3 |
13%
|
|
| Sysmiss | 99 |