| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 318 |
91.1%
|
| 2 | Some difficulty | 31 |
8.9%
|
| 3 | A lot of difficulty | 0 |
0%
|
| 4 | Cannot do at all | 0 |
0%
|
| 99 | Refused | 0 |
0%
|
| Sysmiss | 55 |