| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 1456 |
74%
|
| 1 | only treated nets | 301 |
15.3%
|
| 2 | both treated and untreated nets | 3 |
0.2%
|
| 3 | only untreated nets | 208 |
10.6%
|