| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Never or do not compare | 17 |
16%
|
| 2 | Once a year or less frequent | 58 |
54.7%
|
| 3 | Two or three times a year | 14 |
13.2%
|
| 4 | Monthly or more often | 17 |
16%
|
| Sysmiss | 2429 |