| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1773 |
55.5%
|
| 2 | SOME DIFFICULTY | 69 |
2.2%
|
| 3 | A LOT OF DIFFICULTY | 6 |
0.2%
|
| 9 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 1347 |
42.1%
|