| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2147 |
61.8%
|
| 2 | SOME DIFFICULTY | 23 |
0.7%
|
| 3 | A LOT OF DIFFICULTY | 4 |
0.1%
|
| 9 | NO RESPONSE | 3 |
0.1%
|
| Sysmiss | 1297 |
37.3%
|