| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 4920 |
38.3%
|
| 1 | yes | 7918 |
61.6%
|
| 8 | don't know year | 0 |
0%
|
| 9 | 7 |
0.1%
|
|
| 11 | .Z | 24666 |