| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | currently using | 1482 |
23.3%
|
| 2 | used since last brth | 0 |
0%
|
| 3 | used before last brt | 1938 |
30.5%
|
| 4 | never used | 2934 |
46.2%
|