| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a quarter | 588 |
14%
|
| 2 | Once a year | 1298 |
30.8%
|
| 3 | Once a 2 year period | 57 |
1.4%
|
| 4 | None | 802 |
19%
|
| 5 | When sick | 1467 |
34.8%
|
| Sysmiss | 17 |