| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Never/do not compare | 4 |
14.3%
|
| 2 | Once a year or less frequent | 12 |
42.9%
|
| 3 | Two or three times a year | 2 |
7.1%
|
| 4 | Monthly or more often | 10 |
35.7%
|
| Sysmiss | 83 |