| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 148609 |
95.8%
|
| 2 | Some difficulty | 4977 |
3.2%
|
| 3 | A lot of difficulty | 1429 |
0.9%
|
| 4 | Cannot do at all | 130 |
0.1%
|
| 11 | .A | 535 |