| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 2 |
9.1%
|
|
| 2005 | 2 |
9.1%
|
|
| 2006 | 2 |
9.1%
|
|
| 2007 | 5 |
22.7%
|
|
| 2008 | 5 |
22.7%
|
|
| 2009 | 6 |
27.3%
|
|
| Sysmiss | 77 |