| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 333827 |
98.6%
|
| 2 | Yes, some difficulty | 3693 |
1.1%
|
| 3 | Yes, a lot of difficulty | 654 |
0.2%
|
| 4 | Cannot do at all | 230 |
0.1%
|