| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 2 |
0.3%
|
|
| 2005 | 84 |
13%
|
|
| 2006 | 189 |
29.3%
|
|
| 2007 | 204 |
31.6%
|
|
| 2008 | 125 |
19.4%
|
|
| 2009 | 37 |
5.7%
|
|
| 2010 | 4 |
0.6%
|
|
| Sysmiss | 12267 |