| Value | Category | Cases | |
|---|---|---|---|
| 1 | no- no difficulty | 4782 |
74.7%
|
| 2 | yes- some difficulty | 342 |
5.3%
|
| 3 | yes- a lot of difficulty | 27 |
0.4%
|
| 4 | cannot do at all | 7 |
0.1%
|
| Sysmiss | 1243 |