| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 2240 |
18.7%
|
| 1 | Yes, sometimes | 3804 |
31.7%
|
| 2 | Yes, always | 5486 |
45.7%
|
| 3 | Not applicable | 473 |
3.9%
|
| Sysmiss | 2874 |