| Value | Category | Cases | |
|---|---|---|---|
| -99 | 18 |
6.4%
|
|
| 1 | Every few DAYS | 11 |
3.9%
|
| 2 | Every few WEEKS 3, Every few MONTHS 4, Not at all | 30 |
10.7%
|
| 3 | 103 |
36.7%
|
|
| 4 | 119 |
42.3%
|
|
| Sysmiss | 29 |