| Value | Category | Cases | |
|---|---|---|---|
| 1 | No problem | 15634 |
90.7%
|
| 2 | Slightly difficult | 1387 |
8%
|
| 3 | Very difficult | 185 |
1.1%
|
| 4 | Can't remember or concentrate on anything | 35 |
0.2%
|