| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 108 |
11.5%
|
| 2 | A little difficult | 97 |
10.3%
|
| 3 | Not difficult | 248 |
26.3%
|
| 7 | Missing | 482 |
51.1%
|
| 9 | Not Applicable | 8 |
0.8%
|