| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not at all well | 23 |
1.4%
|
| 2 | Not very well | 112 |
6.9%
|
| 3 | Pretty well | 399 |
24.5%
|
| 4 | Very well | 1091 |
67.1%
|
| r | 1 |
0.1%
|