| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1999 | 24 | 17 |
11.4%
|
|
| 2000 | 70 | 57 |
37.7%
|
|
| 2001 | 54 | 50 |
33.1%
|
|
| 2002 | 27 | 21 |
13.8%
|
|
| 2003 | 8 | 6 |
3.9%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 3110 | 3142 |