| Value | Category | Cases | |
|---|---|---|---|
| 1 | First quartile | 348 |
8.8%
|
| 2 | Second quartile | 639 |
16.2%
|
| 3 | Third quartile | 748 |
18.9%
|
| 4 | Fourth quartile | 1583 |
40.1%
|
| 5 | Don't know | 572 |
14.5%
|
| 6 | Refused | 59 |
1.5%
|