| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 5107 |
77.7%
|
| 2 | SOME DIFFICULTY | 173 |
2.6%
|
| 3 | A LOT OF DIFFICULTY | 8 |
0.1%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 1286 |
19.6%
|