| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 13 |
0.2%
|
|
| 2006 | 1024 |
15.8%
|
|
| 2007 | 1324 |
20.4%
|
|
| 2008 | 1547 |
23.8%
|
|
| 2009 | 1604 |
24.7%
|
|
| 2010 | 989 |
15.2%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 4772 |