| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Never or do not compare | 34 |
44.7%
|
| 2 | Once a year or less frequent | 30 |
39.5%
|
| 3 | Two or three times a year | 8 |
10.5%
|
| 4 | Monthly or more often | 4 |
5.3%
|
| Sysmiss | 59 |