| Value | Category | Cases | |
|---|---|---|---|
| -97 | Refused | 58 |
1.2%
|
| 0 | No difficulty | 4323 |
92.5%
|
| 1 | Some difficulty | 219 |
4.7%
|
| 2 | A lot of difficulty | 38 |
0.8%
|
| 3 | Cannot do entirely | 37 |
0.8%
|