| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 19 |
4.2%
|
| 1 | Never or do not compare | 102 |
22.4%
|
| 2 | Once a year or less frequent | 186 |
40.9%
|
| 3 | Two or three times a year | 75 |
16.5%
|
| 4 | Monthly or more often | 73 |
16%
|
| Sysmiss | 3320 |