| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 441 |
10.6%
|
|
| 2001 | 692 |
16.6%
|
|
| 2002 | 927 |
22.3%
|
|
| 2003 | 834 |
20%
|
|
| 2004 | 896 |
21.5%
|
|
| 2005 | 373 |
9%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 43688 |