| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 16 |
5.2%
|
| 2 | 1 to 2 years | 32 |
10.5%
|
| 3 | Longer than 2 years | 218 |
71.2%
|
| 98 | Undecided or Don’t Know | 40 |
13.1%
|
| Sysmiss | 546 |