| Value | Category | Cases | |
|---|---|---|---|
| -999999999 | 4244 |
1.5%
|
|
| 1 | Essential | 199215 |
69.5%
|
| 2 | Desirable but not essential | 67151 |
23.4%
|
| 3 | Neither | 14704 |
5.1%
|
| 98 | Dont Know | 1174 |
0.4%
|