| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 435 |
46.1%
|
| 2 | A little difficult | 254 |
26.9%
|
| 3 | Not difficult | 225 |
23.9%
|
| 7 | Missing | 14 |
1.5%
|
| 9 | Not Applicable | 15 |
1.6%
|