| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 3677 |
72%
|
| 2 | Minor difficulty | 172 |
3.4%
|
| 3 | Great difficulty | 136 |
2.7%
|
| 8 | 8. Not applicable | 1117 |
21.9%
|
| 9 | I do not know | 1 |
0%
|
| Sysmiss | 2 |