| Value | Category | Cases | |
|---|---|---|---|
| 1 | First quartile | 829 |
41.3%
|
| 2 | Second quartile | 415 |
20.7%
|
| 3 | Third quartile | 112 |
5.6%
|
| 4 | Fourth quartile | 25 |
1.2%
|
| 5 | Don't know | 576 |
28.7%
|
| 6 | Refused | 50 |
2.5%
|