| Value | Category | Cases | |
|---|---|---|---|
| 1 | Did not attend | 594 |
77.9%
|
| 2 | Less than 4 months | 74 |
9.7%
|
| 3 | 4-8 months | 32 |
4.2%
|
| 4 | More than 8 months | 63 |
8.3%
|
| Sysmiss | 237 |