| Value | Category | Cases | |
|---|---|---|---|
| 1 | in years | 1 |
11.1%
|
| 2 | in months | 0 |
0%
|
| 3 | in weeks | 0 |
0%
|
| 77 | don't know | 8 |
88.9%
|
| Sysmiss | 2126 |