| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, no difficulty | 26960 |
98.8%
|
| 2 | yes, some | 270 |
1%
|
| 3 | yes, a lot | 20 |
0.1%
|
| 4 | cannot hear | 38 |
0.1%
|
| Sysmiss | 285 |