| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2885 |
29.1%
|
| 2 | Minor difficulty | 353 |
3.6%
|
| 3 | Big difficulty | 707 |
7.1%
|
| 8 | Not applicable | 4025 |
40.6%
|
| 9 | Don’t know | 1949 |
19.6%
|
| Sysmiss | 7 |