| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 251 |
54.7%
|
| 2 | Some difficulty | 178 |
38.8%
|
| 3 | A lot of difficulty | 21 |
4.6%
|
| 4 | Cannot do at all | 9 |
2%
|
| Sysmiss | 17301 |