| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | No net | 350 |
42.7%
|
| 1 | Only treated nets | 333 |
40.6%
|
| 2 | Both treated and untreated nets | 2 |
0.2%
|
| 3 | Only untreated nets | 135 |
16.5%
|
| Sysmiss | 4509 |