| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 4688 |
91.8%
|
| 2 | Minor difficulty | 254 |
5%
|
| 3 | Great difficulty | 161 |
3.2%
|
| 8 | 8. Not applicable | 0 |
0%
|
| 9 | I do not know | 0 |
0%
|
| Sysmiss | 2 |