| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no net | 4076 |
41.9%
|
| 1 | only treated nets | 5134 |
52.7%
|
| 2 | both treated and untreated nets | 0 |
0%
|
| 3 | only untreated nets | 523 |
5.4%
|
| Sysmiss | 7354 |