| Value | Category | Cases | |
|---|---|---|---|
| 1 | weeks | 3 |
0.1%
|
| 2 | months | 6 |
0.1%
|
| 9 | not applicable | 4057 |
96%
|
| 9999995 | missing:impute | 162 |
3.8%
|
| Sysmiss | 2375 |