| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 949 |
20.4%
|
| 1 | only treated nets | 3619 |
77.9%
|
| 2 | both treated and untreated nets | 0 |
0%
|
| 3 | only untreated nets | 77 |
1.7%
|
| Sysmiss | 3466 |