| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 32259 |
92.1%
|
| 2 | Yes - some difficulty | 1921 |
5.5%
|
| 3 | Yes - a lot of difficulty | 717 |
2%
|
| 4 | Cannot do at all | 140 |
0.4%
|
| Sysmiss | 6975 |