| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty | 3754 |
92.5%
|
| 2 | some difficulty | 212 |
5.2%
|
| 3 | a lot of difficulty | 69 |
1.7%
|
| 4 | cannot do at all | 23 |
0.6%
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 8891 |