| Value | Category | Cases | |
|---|---|---|---|
| -97 | Refused | 52 |
1.1%
|
| 0 | No difficulty | 4458 |
95.4%
|
| 1 | Some difficulty | 125 |
2.7%
|
| 2 | A lot of difficulty | 20 |
0.4%
|
| 3 | Cannot do entirely | 20 |
0.4%
|