| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2.2%
|
| 1 | Never/do not compare | 4 |
8.7%
|
| 2 | Once a year or less frequent | 12 |
26.1%
|
| 3 | Two or three times a year | 13 |
28.3%
|
| 4 | Monthly or more often | 16 |
34.8%
|
| Sysmiss | 74 |