| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | No difficulty | 6076 | 6446 |
65%
|
| 2 | Minor difficulty | 587 | 590 |
5.9%
|
| 3 | Big difficulty | 401 | 401 |
4%
|
| 8 | Not applicable | 2846 | 2470 |
24.9%
|
| 9 | Don't know | 9 | 15 |
0.1%
|
| Sysmiss | 7 | 5 |