| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 1366 |
96.1%
|
| 2 | Some difficulty | 44 |
3.1%
|
| 3 | A lot of difficulty | 8 |
0.6%
|
| 4 | Cannot be understood at all | 3 |
0.2%
|
| Sysmiss | 1229 |