| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty | 5896 |
92.5%
|
| 2 | some difficulty | 315 |
4.9%
|
| 3 | a lot of difficulty | 136 |
2.1%
|
| 4 | cannot do at all | 25 |
0.4%
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 6577 |