| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 2491 |
42.3%
|
| 1 | only treated nets | 3306 |
56.1%
|
| 2 | both treated and untreated nets | 0 |
0%
|
| 3 | only untreated nets | 92 |
1.6%
|
| Sysmiss | 172 |