| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes, regularly | 320 |
23.2%
|
| 2 | yes, irregularly | 416 |
30.1%
|
| 3 | yes, regularly & irregularly | 64 |
4.6%
|
| 4 | no | 581 |
42.1%
|
| Sysmiss | 47805 |