| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 59229 |
96.8%
|
| 2 | Yes - some difficulty | 1479 |
2.4%
|
| 3 | Yes - a lot of difficulty | 297 |
0.5%
|
| 4 | Cannot do at all | 168 |
0.3%
|
| Sysmiss | 9463 |