| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 6790 |
94.9%
|
| 2 | SOME DIFFICULTY | 219 |
3.1%
|
| 3 | A LOT OF DIFFICULTY | 15 |
0.2%
|
| 4 | CANNOT BE UNDERSTOOD AT ALL | 10 |
0.1%
|
| Sysmiss | 121 |
1.7%
|