| Value | Category | Cases | |
|---|---|---|---|
| -8 | dk | 7 |
1.1%
|
| -7 | more than 3 years ago | 96 |
14.7%
|
| 0 | 272 |
41.5%
|
|
| 1 | 164 |
25%
|
|
| 2 | 116 |
17.7%
|
|
| Sysmiss | 4010 |