| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 1921 |
61.5%
|
| 2 | Minor difficulty | 129 |
4.1%
|
| 3 | Big difficulty | 80 |
2.6%
|
| 8 | Not applicable | 949 |
30.4%
|
| 9 | Don’t know | 28 |
0.9%
|
| Sysmiss | 15 |