| Value | Category | Cases | |
|---|---|---|---|
| 0 | No difficulty | 57559 |
97.7%
|
| 1 | Yes, some difficulty | 1027 |
1.7%
|
| 2 | Yes, major difficulty | 304 |
0.5%
|
| 3 | Not at all | 50 |
0.1%
|