| Value | Category | Cases | |
|---|---|---|---|
| 1 | First quartile | 406 |
19.5%
|
| 2 | Second quartile | 405 |
19.5%
|
| 3 | Third quartile | 605 |
29.1%
|
| 4 | Fourth quartile | 490 |
23.6%
|
| 5 | Don't know | 153 |
7.4%
|
| 6 | Refused | 18 |
0.9%
|