| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 2 |
0.1%
|
| 2 | No - no difficulty | 2396 |
92.4%
|
| 3 | Yes – a lot of difficulty | 31 |
1.2%
|
| 4 | Yes – some difficulty | 165 |
6.4%
|