| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 12 |
12.4%
|
|
| 2005 | 44 |
45.4%
|
|
| 2006 | 20 |
20.6%
|
|
| 2007 | 9 |
9.3%
|
|
| 2008 | 6 |
6.2%
|
|
| 9997 | Inconsistent | 6 |
6.2%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 8347 |