| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 253 |
8.8%
|
|
| 2004 | 439 |
15.3%
|
|
| 2005 | 562 |
19.5%
|
|
| 2006 | 724 |
25.2%
|
|
| 2007 | 783 |
27.2%
|
|
| 2008 | 114 |
4%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 15546 |