| Value | Category | Cases | |
|---|---|---|---|
| 1 | Essential | 2877 |
91%
|
| 2 | Desirable | 256 |
8.1%
|
| 3 | Neither | 26 |
0.8%
|
| 8 | Do not know | 3 |
0.1%
|
| Sysmiss | 2 |