| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO, NO DIFFICULTY | 21511 |
87.5%
|
| 2 | YES, SOME DIFFICULTY | 1759 |
7.2%
|
| 3 | YES, A LOT OF DIFFICULTY | 283 |
1.2%
|
| 4 | CANNOT DO IT AT ALL | 46 |
0.2%
|
| 5 | (TOO YOUNG TO TELL) | 981 |
4%
|
| Sysmiss | 140 |