| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 1 |
0.1%
|
| 2 | No - no difficulty | 861 |
96.5%
|
| 3 | Yes – a lot of difficulty | 7 |
0.8%
|
| 4 | Yes – some difficulty | 23 |
2.6%
|