| Value | Category | Cases | |
|---|---|---|---|
| -97 | Refused | 53 |
1.1%
|
| 0 | No difficulty | 4382 |
93.7%
|
| 1 | Some difficulty | 203 |
4.3%
|
| 2 | A lot of difficulty | 21 |
0.4%
|
| 3 | Cannot do entirely | 16 |
0.3%
|