| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 4759 |
97.5%
|
| 1 | 92 |
1.9%
|
|
| 2 | 23 |
0.5%
|
|
| 3 | 4 |
0.1%
|
|
| 4 | 2 |
0%
|
|
| 77 | refused | 0 |
0%
|
| 88 | don't know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 90 |