| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 36989 |
97.1%
|
| 2 | Yes - some difficulty | 906 |
2.4%
|
| 3 | Yes - a lot of difficulty | 155 |
0.4%
|
| 4 | Cannot, at all | 51 |
0.1%
|
| Sysmiss | 8769 |