| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | No difficulty | 1505 | 143415 |
19.5%
|
| 2 | Minor difficulty | 162 | 14338 |
1.9%
|
| 3 | Big difficulty | 143 | 12024 |
1.6%
|
| 88 | Not applicable | 6526 | 564160 |
76.7%
|
| 99 | Don’t know | 15 | 1404 |
0.2%
|
| Sysmiss | 8 | 593 |