| Value | Category | Cases | |
|---|---|---|---|
| 0 | Less than month | 0 |
0%
|
| 1 | More than a month but less than 3 months | 2 |
40%
|
| 2 | 3-6 months | 2 |
40%
|
| 3 | More than 6 months | 1 |
20%
|
| Sysmiss | 244 |