| Value | Category | Cases | |
|---|---|---|---|
| 0 | Less than one month ago | 1 |
0%
|
| 1 | 3 |
0%
|
|
| 3 | 1 |
0%
|
|
| 6 | 1 |
0%
|
|
| 99 | Missing | 3 |
0%
|
| Sysmiss | 18099 |
100%
|