| Value | Category | Cases | |
|---|---|---|---|
| -9 | NIU (not in universe) | 525 |
80.3%
|
| 1 | used last time | 105 |
16.1%
|
| 2 | not used last time | 24 |
3.7%
|
| 9999995 | missing:impute | 0 |
0%
|