| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 60011 |
98.1%
|
| 2 | Yes - some difficulty | 766 |
1.3%
|
| 3 | Yes - a lot of difficulty | 253 |
0.4%
|
| 4 | Cannot do at all | 142 |
0.2%
|
| Sysmiss | 9464 |