| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 18829 |
93.7%
|
| 2 | Yes - some difficulty | 809 |
4%
|
| 3 | Yes - a lot of difficulty | 343 |
1.7%
|
| 4 | Cannot do at all | 105 |
0.5%
|
| Sysmiss | 5356 |