| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 11561 |
80.9%
|
| 2 | SOME DIFFICULTY | 211 |
1.5%
|
| 3 | A LOT OF DIFFICULTY | 10 |
0.1%
|
| 9 | NO RESPONSE | 8 |
0.1%
|
| Sysmiss | 2507 |
17.5%
|