| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 340 |
74.1%
|
| 2 | Some difficulty | 91 |
19.8%
|
| 3 | A lot of difficulty | 22 |
4.8%
|
| 4 | Cannot do at all | 6 |
1.3%
|
| Sysmiss | 17301 |