| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 2 | 2 |
3.8%
|
|
| 1999 | 5 | 6 |
14.1%
|
|
| 2000 | 13 | 11 |
27.9%
|
|
| 2001 | 22 | 12 |
29.2%
|
|
| 2002 | 13 | 9 |
22.5%
|
|
| 2003 | 1 | 1 |
2.5%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 3237 | 3252 |