| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 134 |
96.4%
|
| 1 | 5 |
3.6%
|
|
| 77 | refused | 0 |
0%
|
| 88 | don't know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 4831 |