| Valeur | Modalité | Cas | |
|---|---|---|---|
| 1 | Every week | 550 |
7.7%
|
| 2 | At least once a month | 402 |
5.6%
|
| 3 | Less often | 220 |
3.1%
|
| 4 | Once for 3 months | 26 |
0.4%
|
| Sysmiss | 5937 |