| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2713 |
97.1%
|
| 2 | SOME DIFFICULTY | 23 |
0.8%
|
| 3 | A LOT OF DIFFICULTY | 2 |
0.1%
|
| 4 | CANNOT SEE AT ALL | 1 |
0%
|
| Sysmiss | 55 |
2%
|