| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 8505 |
79.5%
|
| 2 | SOME DIFFICULTY | 354 |
3.3%
|
| 3 | A LOT OF DIFFICULTY | 31 |
0.3%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1812 |
16.9%
|