| Value | Category | Cases | |
|---|---|---|---|
| -999999999 | 2607 |
1.5%
|
|
| 1 | Essential | 137780 |
78.7%
|
| 2 | Desirable but not essential | 31882 |
18.2%
|
| 3 | Neither | 2698 |
1.5%
|
| 98 | Dont Know | 109 |
0.1%
|