| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 8676 |
81.1%
|
| 2 | SOME DIFFICULTY | 196 |
1.8%
|
| 3 | A LOT OF DIFFICULTY | 18 |
0.2%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1812 |
16.9%
|