| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 |
5.1%
|
| 1 | Never or do not compare | 184 |
31.1%
|
| 2 | Once a year or less frequent | 131 |
22.2%
|
| 3 | Two or three times a year | 65 |
11%
|
| 4 | Monthly or more often | 181 |
30.6%
|
| Sysmiss | 1049 |