| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 18 |
3%
|
|
| 2005 | 39 |
6.6%
|
|
| 2006 | 75 |
12.6%
|
|
| 2007 | 118 |
19.9%
|
|
| 2008 | 221 |
37.3%
|
|
| 2009 | 122 |
20.6%
|
|
| Sysmiss | 50682 |