| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 148 |
97.4%
|
| 1 | 4 |
2.6%
|
|
| 77 | refused | 0 |
0%
|
| 88 | don't know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 4818 |