| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than a month | 0 |
0%
|
| 2 | 1-2 months | 2 |
100%
|
| 3 | 2-3 months | 0 |
0%
|
| 4 | more than 3 months | 0 |
0%
|
| Sysmiss | 214 |