| Value | Category | Cases | |
|---|---|---|---|
| 1 | Shorter than 1 year | 5 |
3.9%
|
| 2 | 1 to 2 years | 9 |
7%
|
| 3 | Longer than 2 years | 79 |
61.7%
|
| 98 | Undecided or Don’t Know | 35 |
27.3%
|
| Sysmiss | 9414 |