| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 150793 |
97.2%
|
| 2 | Some difficulty | 3313 |
2.1%
|
| 3 | A lot of difficulty | 852 |
0.5%
|
| 4 | Cannot do at all | 177 |
0.1%
|
| 11 | .A | 545 |