| Value | Category | Cases | |
|---|---|---|---|
| -97 | Refused | 53 |
1.1%
|
| 0 | No difficulty | 4204 |
89.9%
|
| 1 | Some difficulty | 354 |
7.6%
|
| 2 | A lot of difficulty | 44 |
0.9%
|
| 3 | Cannot do entirely | 20 |
0.4%
|