| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 4 |
0.2%
|
| 2 | No - no difficulty | 2406 |
92.8%
|
| 3 | Yes – a lot of difficulty | 21 |
0.8%
|
| 4 | Yes – some difficulty | 163 |
6.3%
|