| Valeur | Modalité | Cas | |
|---|---|---|---|
| 1 | Every week | 541 |
3.5%
|
| 2 | At least once a month | 1020 |
6.5%
|
| 3 | Less often | 855 |
5.5%
|
| 4 | Once every 3 months | 1 |
0%
|
| Sysmiss | 13195 |