| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 181 |
98.9%
|
| 1 | 2 |
1.1%
|
|
| 77 | refused | 0 |
0%
|
| 88 | don't know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 4787 |