| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. none | 12 |
0.5%
|
| 2 | 2. a few | 189 |
8.6%
|
| 3 | 3. some but not all | 816 |
37.3%
|
| 4 | 4. almost all or all learners wearing masks | 1168 |
53.5%
|
| 99 | 99. other | 0 |
0%
|
| Sysmiss | 2353 |