| Value | Category | Cases | |
|---|---|---|---|
| 1 | no- no difficulty | 5059 |
79%
|
| 2 | yes- some difficulty | 70 |
1.1%
|
| 3 | yes- a lot of difficulty | 13 |
0.2%
|
| 4 | cannot do at all | 9 |
0.1%
|
| Sysmiss | 1250 |