| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 329979 |
97.5%
|
| 2 | Yes, some difficulty | 7105 |
2.1%
|
| 3 | Yes, a lot of difficulty | 943 |
0.3%
|
| 4 | Cannot do at all | 377 |
0.1%
|