| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 1 |
0.1%
|
| 2 | No - no difficulty | 847 |
95%
|
| 3 | Yes – a lot of difficulty | 3 |
0.3%
|
| 4 | Yes – some difficulty | 41 |
4.6%
|