| Value | Category | Cases | |
|---|---|---|---|
| 1 | Poorest | 1988 |
19.4%
|
| 2 | Second | 1977 |
19.3%
|
| 3 | Middle | 2052 |
20%
|
| 4 | Fourth | 2079 |
20.3%
|
| 5 | Richest | 2167 |
21.1%
|