| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 3 |
0.1%
|
| 2 | No - no difficulty | 2112 |
81.4%
|
| 3 | Yes – a lot of difficulty | 58 |
2.2%
|
| 4 | Yes – some difficulty | 421 |
16.2%
|