| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 33 | 33 |
11.5%
|
|
| 1999 | 44 | 35 |
12.1%
|
|
| 2000 | 54 | 61 |
21.3%
|
|
| 2001 | 64 | 53 |
18.5%
|
|
| 2002 | 69 | 64 |
22.3%
|
|
| 2003 | 39 | 41 |
14.3%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 2990 | 3008 |