| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 3 |
0.2%
|
| 2 | No - no difficulty | 1590 |
92.5%
|
| 3 | Yes – a lot of difficulty | 8 |
0.5%
|
| 4 | Yes – some difficulty | 117 |
6.8%
|