| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 261 |
3.8%
|
|
| 2006 | 1196 |
17.3%
|
|
| 2007 | 1407 |
20.3%
|
|
| 2008 | 1544 |
22.3%
|
|
| 2009 | 1513 |
21.9%
|
|
| 2010 | 994 |
14.4%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 4358 |