| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
1.1%
|
|
| 1 | Weekly | 7 |
3.8%
|
| 2 | Monthly | 18 |
9.8%
|
| 3 | A few times a year | 52 |
28.4%
|
| 4 | Rarely | 57 |
31.1%
|
| 5 | Never | 23 |
12.6%
|
| Sysmiss | 24 |
13.1%
|