| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 108 |
1.6%
|
|
| 2006 | 1174 |
17.1%
|
|
| 2007 | 1382 |
20.1%
|
|
| 2008 | 1558 |
22.7%
|
|
| 2009 | 1694 |
24.6%
|
|
| 2010 | 960 |
14%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 4397 |