| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 51 |
3%
|
|
| 2005 | 108 |
6.4%
|
|
| 2006 | 405 |
24.2%
|
|
| 2007 | 502 |
30%
|
|
| 2008 | 578 |
34.5%
|
|
| 2009 | 31 |
1.9%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 7382 |