| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | No difficulty | 1520 | 1470 |
14.8%
|
| 2 | Minor difficulty | 120 | 101 |
1%
|
| 3 | Big difficulty | 741 | 597 |
6%
|
| 8 | Not applicable | 5894 | 6316 |
63.7%
|
| 9 | Don't know | 1644 | 1437 |
14.5%
|
| Sysmiss | 7 | 5 |