| Value | Category | Cases | |
|---|---|---|---|
| 1 | 6-11 Months | 24 |
24.5%
|
| 2 | 12-23 Months | 28 |
28.6%
|
| 3 | >=24 Months | 5 |
5.1%
|
| 4 | Undecided or don't know | 41 |
41.8%
|
| Sysmiss | 222 |