| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 33651 |
96%
|
| 2 | Yes - some difficulty | 991 |
2.8%
|
| 3 | Yes - a lot of difficulty | 283 |
0.8%
|
| 4 | Cannot do at all | 112 |
0.3%
|
| Sysmiss | 6975 |