| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | No net | 679 |
35.8%
|
| 1 | Only treated nets | 826 |
43.6%
|
| 2 | Both treated and untreated nets | 1 |
0.1%
|
| 3 | Only untreated nets | 390 |
20.6%
|
| Sysmiss | 3433 |