| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2349 |
95.9%
|
| 2 | Some difficulty | 82 |
3.3%
|
| 3 | A lot of difficulty | 15 |
0.6%
|
| 4 | Cannot remember/concentrate at all | 1 |
0%
|
| 9 | No response | 2 |
0.1%
|
| Sysmiss | 1576 |