| Value | Category | Cases | |
|---|---|---|---|
| 1 | Almost every month | 2026 |
10.2%
|
| 2 | In some months, but not every month | 2285 |
11.5%
|
| 3 | Only once or twice | 488 |
2.4%
|
| 8 | Not applicable | 14656 |
73.5%
|
| 9 | Unspecified | 485 |
2.4%
|