| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | No difficulty | 1297 | 1291 |
17.2%
|
| 2 | Minor difficulty | 61 | 61 |
0.8%
|
| 3 | Big difficulty | 34 | 33 |
0.4%
|
| 8 | Not applicable | 6065 | 6074 |
81%
|
| 9 | Don’t know | 20 | 19 |
0.3%
|
| Sysmiss | 26 | 23 |