| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 1019 |
21.7%
|
| 1 | only treated nets | 3595 |
76.5%
|
| 2 | both treated and untreated nets | 0 |
0%
|
| 3 | only untreated nets | 83 |
1.8%
|