| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, no difficulty | 36063 |
98.6%
|
| 2 | Yes, some difficulty | 338 |
0.9%
|
| 3 | Yes, a lot of difficulty | 118 |
0.3%
|
| 4 | Cannot do it at all | 68 |
0.2%
|
| Sysmiss | 4994 |