| Value | Category | Cases | |
|---|---|---|---|
| -2 | Refusal to answer | 10 |
0.5%
|
| -1 | Don't know | 2 |
0.1%
|
| 1 | Hourly | 31 |
1.5%
|
| 2 | Daily | 38 |
1.8%
|
| 3 | Weekly | 71 |
3.3%
|
| 4 | Monthly | 1977 |
92.9%
|
| Sysmiss | 4 |