| Value | Category | Cases | |
|---|---|---|---|
| -9 | DO NOT KNOW | 0 |
0%
|
| 1 | Less than 3 months | 2 |
0.3%
|
| 2 | 3-6 months | 20 |
3.2%
|
| 3 | 7-9 months | 41 |
6.5%
|
| 4 | 10-11 months | 37 |
5.9%
|
| 5 | 12 months | 526 |
84%
|
| Sysmiss | 127 |