| Value | Category | Cases | |
|---|---|---|---|
| 1 | First quartile | 259 |
10.8%
|
| 2 | Second quartile | 424 |
17.7%
|
| 3 | Third quartile | 424 |
17.7%
|
| 4 | Fourth quartile | 912 |
38%
|
| 5 | Don't know | 349 |
14.5%
|
| 6 | Refused | 32 |
1.3%
|