| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | currently using | 236 |
14.4%
|
| 2 | used since last brth | 0 |
0%
|
| 3 | used before last brt | 223 |
13.6%
|
| 4 | never used | 1180 |
72%
|