| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 9402 |
64.4%
|
| 2 | SOME DIFFICULTY | 2560 |
17.5%
|
| 3 | A LOT OF DIFFICULTY | 555 |
3.8%
|
| 4 | CANNOT REMMEBER/CONCENTRATE AT ALL | 10 |
0.1%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 2081 |
14.2%
|