| Value | Category | Cases | |
|---|---|---|---|
| 1 | Now | 9 |
0.2%
|
| 2 | Later | 27 |
0.6%
|
| 3 | Not at all | 1 |
0%
|
| 5 | Missing | 23 |
0.5%
|
| 7 | Refusal | 0 |
0%
|
| 9 | Not applicable | 4279 |
98.6%
|
| Sysmiss | 1 |