| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 |
0.1%
|
|
| 1 | yes | 2218 |
49.3%
|
| 2 | no | 2275 |
50.6%
|
| 77 | don't know | 0 |
0%
|
| Sysmiss | 4 |