| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2447 |
77.5%
|
| 2 | SOME DIFFICULTY | 41 |
1.3%
|
| 3 | A LOT OF DIFFICULTY | 6 |
0.2%
|
| 9 | NO RESPONSE | 3 |
0.1%
|
| Sysmiss | 660 |
20.9%
|