| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2440 |
89.7%
|
| 2 | Some difficulty | 257 |
9.5%
|
| 3 | A lot of difficulty | 17 |
0.6%
|
| 4 | Cannot understand at all | 4 |
0.1%
|
| 9 | No response | 1 |
0%
|
| Sysmiss | 1935 |