| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 312 |
10.3%
|
| 2 | 1 to 2 years | 553 |
18.3%
|
| 3 | Longer than 2 years | 1553 |
51.3%
|
| 98 | Undecided or Don’t Know | 607 |
20.1%
|
| Sysmiss | 6517 |