| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 4 |
0.2%
|
| 2 | No - no difficulty | 2520 |
97.1%
|
| 3 | Yes – a lot of difficulty | 9 |
0.3%
|
| 4 | Yes – some difficulty | 61 |
2.4%
|