| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 422 |
60%
|
| 2 | SOME DIFFICULTY | 4 |
0.6%
|
| 3 | A LOT OF DIFFICULTY | 2 |
0.3%
|
| 4 | CANNOT HEAR AT ALL | 1 |
0.1%
|
| Sysmiss | 274 |
39%
|