| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 57819 |
94.5%
|
| 2 | Yes - some difficulty | 2768 |
4.5%
|
| 3 | Yes - a lot of difficulty | 482 |
0.8%
|
| 4 | Cannot do at all | 104 |
0.2%
|
| Sysmiss | 9463 |