| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 13 |
0.2%
|
|
| 2006 | 363 |
6.5%
|
|
| 2007 | 1129 |
20.1%
|
|
| 2008 | 1424 |
25.3%
|
|
| 2009 | 1844 |
32.8%
|
|
| 2010 | 850 |
15.1%
|
|
| Sysmiss | 5650 |