| Value | Category | Cases | |
|---|---|---|---|
| 1 | Cannot do at all | 2 |
0.1%
|
| 2 | No - no difficulty | 1601 |
93.2%
|
| 3 | Yes – a lot of difficulty | 3 |
0.2%
|
| 4 | Yes – some difficulty | 112 |
6.5%
|