| Value | Category | Cases | |
|---|---|---|---|
| 0 | no net | 1317 |
39.2%
|
| 1 | only treated nets | 1971 |
58.7%
|
| 2 | both treated and untreated nets | 0 |
0%
|
| 3 | only untreated nets | 68 |
2%
|
| Sysmiss | 258 |