| Value | Category | Cases | |
|---|---|---|---|
| -97 | Refused | 54 |
1.2%
|
| 0 | No difficulty | 4430 |
94.8%
|
| 1 | Some difficulty | 158 |
3.4%
|
| 2 | A lot of difficulty | 16 |
0.3%
|
| 3 | Cannot do entirely | 17 |
0.4%
|