| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 153349 |
98.9%
|
| 2 | Some difficulty | 1070 |
0.7%
|
| 3 | A lot of difficulty | 450 |
0.3%
|
| 4 | Cannot do at all | 264 |
0.2%
|
| 11 | .A | 547 |