| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 4927 |
74.9%
|
| 2 | SOME DIFFICULTY | 351 |
5.3%
|
| 3 | A LOT OF DIFFICULTY | 8 |
0.1%
|
| 9 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 1286 |
19.6%
|