| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 330 |
94.6%
|
| 2 | Some difficulty | 17 |
4.9%
|
| 3 | A lot of difficulty | 0 |
0%
|
| 4 | Cannot do at all | 1 |
0.3%
|
| 99 | Refused | 1 |
0.3%
|
| Sysmiss | 55 |