| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 9637 |
82.1%
|
| 2 | SOME DIFFICULTY | 211 |
1.8%
|
| 3 | A LOT OF DIFFICULTY | 26 |
0.2%
|
| 9 | NO RESPONSE | 5 |
0%
|
| Sysmiss | 1858 |
15.8%
|