| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 6 |
1.9%
|
| 2 | No, no difficulty | 291 |
91.5%
|
| 3 | Yes, a lot of difficulty | 1 |
0.3%
|
| 4 | Yes, some difficulty | 20 |
6.3%
|