| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 2 | 3 |
0.9%
|
|
| 1999 | 108 | 104 |
32%
|
|
| 2000 | 140 | 114 |
35.2%
|
|
| 2001 | 92 | 81 |
24.9%
|
|
| 2002 | 25 | 22 |
6.6%
|
|
| 2003 | 2 | 1 |
0.4%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 2924 | 2968 |