| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 32549 |
92.9%
|
| 2 | Yes - some difficulty | 2032 |
5.8%
|
| 3 | Yes - a lot of difficulty | 407 |
1.2%
|
| 4 | Cannot do at all | 49 |
0.1%
|
| Sysmiss | 6975 |