| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 4 | 5 |
1.1%
|
|
| 1999 | 144 | 135 |
30.3%
|
|
| 2000 | 190 | 162 |
36.3%
|
|
| 2001 | 121 | 111 |
25%
|
|
| 2002 | 32 | 27 |
6.1%
|
|
| 2003 | 5 | 6 |
1.2%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 2797 | 2848 |