| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 |
0.1%
|
|
| 1 | yes | 389 |
8.6%
|
| 2 | no | 4107 |
91.3%
|
| 77 | don't know | 0 |
0%
|
| Sysmiss | 1 |