| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 12230 |
81.4%
|
| 2 | SAME DIFFICULTY | 1025 |
6.8%
|
| 3 | A LOT OF DIFFICULTY | 63 |
0.4%
|
| 4 | CANNOT REMEMBER/CONCENTRATE AT ALL | 1 |
0%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1699 |
11.3%
|