| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty | 2056 |
92.9%
|
| 2 | some difficulty | 95 |
4.3%
|
| 3 | a lot of difficulty | 40 |
1.8%
|
| 4 | cannot do at all | 21 |
0.9%
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 10737 |