| Value | Category | Cases | |
|---|---|---|---|
| 1 | Essential | 2813 |
89%
|
| 2 | Desirable | 322 |
10.2%
|
| 3 | Neither | 23 |
0.7%
|
| 8 | Do not know | 4 |
0.1%
|
| Sysmiss | 2 |