| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | currently using | 846 |
14.2%
|
| 2 | used since last brth | 0 |
0%
|
| 3 | used before last brt | 831 |
14%
|
| 4 | never used | 4276 |
71.8%
|