| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty | 401 |
89.9%
|
| 2 | some difficulty | 34 |
7.6%
|
| 3 | a lot of difficulty | 7 |
1.6%
|
| 4 | cannot do at all | 4 |
0.9%
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 12503 |