| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 1329 |
93.5%
|
| 2 | Some difficulty | 75 |
5.3%
|
| 3 | A lot of difficulty | 14 |
1%
|
| 4 | Cannot remeber things at all | 3 |
0.2%
|
| Sysmiss | 1229 |