| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 49 | 54 |
4.1%
|
|
| 1999 | 134 | 121 |
9.2%
|
|
| 2000 | 195 | 194 |
14.7%
|
|
| 2001 | 330 | 330 |
25%
|
|
| 2002 | 453 | 423 |
32%
|
|
| 2003 | 213 | 200 |
15.1%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 1919 | 1972 |