| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 1343 |
21.2%
|
| 1 | only treated nets | 4879 |
77.2%
|
| 2 | both treated and untreated nets | 1 |
0%
|
| 3 | only untreated nets | 101 |
1.6%
|
| Sysmiss | 517 |