| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 1872 |
23.1%
|
| 1 | only treated nets | 6102 |
75.2%
|
| 2 | both treated and untreated nets | 1 |
0%
|
| 3 | only untreated nets | 136 |
1.7%
|