| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | No net | 109 |
44.9%
|
| 1 | Only treated nets | 94 |
38.7%
|
| 2 | Both treated and untreated nets | 0 |
0%
|
| 3 | Only untreated nets | 40 |
16.5%
|
| Sysmiss | 631 |