| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 2 |
1.1%
|
|
| 2004 | 6 |
3.2%
|
|
| 2005 | 30 |
16.2%
|
|
| 2006 | 62 |
33.5%
|
|
| 2007 | 45 |
24.3%
|
|
| 2008 | 24 |
13%
|
|
| 2009 | 16 |
8.6%
|
|
| Sysmiss | 49 |