| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 479 |
6.1%
|
|
| 2006 | 1297 |
16.4%
|
|
| 2007 | 1524 |
19.3%
|
|
| 2008 | 1658 |
21%
|
|
| 2009 | 1839 |
23.3%
|
|
| 2010 | 1102 |
14%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 3374 |