| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 1802 |
40.6%
|
| 1 | only treated nets | 2555 |
57.6%
|
| 2 | both treated and untreated nets | 0 |
0%
|
| 3 | only untreated nets | 77 |
1.7%
|
| Sysmiss | 3194 |