| Value | Category | Cases | |
|---|---|---|---|
| 1 | No problem | 12616 |
73.2%
|
| 2 | Slightly difficult | 3891 |
22.6%
|
| 3 | Very difficult | 711 |
4.1%
|
| 4 | I don't see it at all | 23 |
0.1%
|