| Value | Category | Cases | |
|---|---|---|---|
| -2 | No answer | 30 |
1.2%
|
| -1 | Don't know | 4 |
0.2%
|
| 1 | Lower | 45 |
1.7%
|
| 2 | Middle | 1200 |
46.2%
|
| 3 | Higher | 1317 |
50.7%
|