| Value | Category | Cases | |
|---|---|---|---|
| 1 | Now | 4 |
0.2%
|
| 2 | Later | 45 |
1.9%
|
| 3 | Not at all | 11 |
0.5%
|
| 5 | miss | 8 |
0.3%
|
| 7 | Refusal | 0 |
0%
|
| 9 | na | 2282 |
97.1%
|
| Sysmiss | 55 |