| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 5 |
0.1%
|
| 0 | No | 4964 |
90.6%
|
| 1 | Yes | 504 |
9.2%
|
| 98 | Don't know | 6 |
0.1%
|
| 99 | Refused to answer | 2 |
0%
|