| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 3 |
0%
|
|
| 2006 | 725 |
11.8%
|
|
| 2007 | 1327 |
21.5%
|
|
| 2008 | 1536 |
24.9%
|
|
| 2009 | 1571 |
25.5%
|
|
| 2010 | 1002 |
16.3%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 5109 |