| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Never/do not compare | 9 |
12.3%
|
| 2 | Once a year or less frequent | 8 |
11%
|
| 3 | Two or three times a year | 14 |
19.2%
|
| 4 | Monthly or more often | 42 |
57.5%
|
| Sysmiss | 47 |