| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 8796 |
82.2%
|
| 2 | SOME DIFFICULTY | 86 |
0.8%
|
| 3 | A LOT OF DIFFICULTY | 7 |
0.1%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 1812 |
16.9%
|