| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 81 |
6.8%
|
| 2 | Easy | 269 |
22.4%
|
| 3 | Difficult | 323 |
26.9%
|
| 4 | Very difficult | 260 |
21.7%
|
| 7 | Not applicable | 266 |
22.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|