| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 488 |
6.2%
|
|
| 2006 | 1327 |
16.7%
|
|
| 2007 | 1543 |
19.5%
|
|
| 2008 | 1666 |
21%
|
|
| 2009 | 1827 |
23%
|
|
| 2010 | 1079 |
13.6%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 3343 |