| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | No difficulty | 1576 | 1670 |
53.7%
|
| 2 | Minor difficulty | 165 | 191 |
6.2%
|
| 3 | Big difficulty | 156 | 158 |
5.1%
|
| 8 | Not applicable | 1191 | 1064 |
34.2%
|
| 9 | Don't know | 19 | 24 |
0.8%
|
| Sysmiss | 15 | 14 |