| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 4 |
0.4%
|
| -66 | Refuse to answer | 1 |
0.1%
|
| 1 | Only once or twice | 292 |
30.4%
|
| 2 | In some months but not every month | 546 |
56.9%
|
| 3 | Almost every month | 117 |
12.2%
|
| Sysmiss | 419 |