| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 1 |
0.1%
|
| 2 | No - no difficulty | 1624 |
94.5%
|
| 3 | Yes – a lot of difficulty | 9 |
0.5%
|
| 4 | Yes – some difficulty | 84 |
4.9%
|