| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 4859 |
99.6%
|
| 1 | 11 |
0.2%
|
|
| 2 | 5 |
0.1%
|
|
| 3 | 3 |
0.1%
|
|
| 8 | 1 |
0%
|
|
| 10 | 1 |
0%
|
|
| 77 | refused | 0 |
0%
|
| 88 | don't know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 90 |