| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 19379 |
96.5%
|
| 2 | Yes - some difficulty | 461 |
2.3%
|
| 3 | Yes - a lot of difficulty | 189 |
0.9%
|
| 4 | Cannot do at all | 57 |
0.3%
|
| Sysmiss | 5356 |