| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 33259 |
94.9%
|
| 2 | Yes - some difficulty | 1365 |
3.9%
|
| 3 | Yes - a lot of difficulty | 355 |
1%
|
| 4 | Cannot do at all | 58 |
0.2%
|
| Sysmiss | 6975 |