| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 21 |
0.3%
|
|
| 2006 | 1053 |
15.7%
|
|
| 2007 | 1361 |
20.3%
|
|
| 2008 | 1605 |
24%
|
|
| 2009 | 1626 |
24.3%
|
|
| 2010 | 1028 |
15.4%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 4579 |