| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Never | 17578 |
71.8%
|
| 1 | Daily | 6101 |
24.9%
|
| 2 | Weekly | 529 |
2.2%
|
| 3 | Monthly | 135 |
0.6%
|
| 4 | Less than monthly | 137 |
0.6%
|
| 9 | 19 |