| Value | Category | Cases | |
|---|---|---|---|
| -9 | NIU (not in universe) | 835 |
96%
|
| 1 | yes | 31 |
3.6%
|
| 2 | yes no date | 2 |
0.2%
|
| 3 | no | 0 |
0%
|
| 4 | i don't know | 0 |
0%
|
| 5 | card unreadable | 0 |
0%
|
| 98 | don't know | 0 |
0%
|
| 9999995 | missing:impute | 2 |
0.2%
|