| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.1%
|
|
| 1 | Yes | 31 |
1.6%
|
| 2 | No | 1856 |
98.1%
|
| 77 | Don't know | 4 |
0.2%
|
| Sysmiss | 641 |