| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2537 |
93.3%
|
| 2 | Some difficulty | 167 |
6.1%
|
| 3 | A lot of difficulty | 12 |
0.4%
|
| 4 | Cannot understand at all | 2 |
0.1%
|
| 9 | No response | 1 |
0%
|
| Sysmiss | 1935 |