| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once per month | 1309 |
15.8%
|
| 2 | Once every few months | 1165 |
14%
|
| 3 | Other | 330 |
4%
|
| 4 | No (skip to PWH20) | 5503 |
66.2%
|
| Sysmiss | 11202 |