| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | currently using | 5491 |
31.1%
|
| 2 | used since last birth | 1698 |
9.6%
|
| 3 | used before last birth | 1649 |
9.3%
|
| 4 | never used | 8821 |
50%
|