| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 0 |
0%
|
| 2 | 1 to 2 years | 0 |
0%
|
| 3 | Greater than 2 years | 11 |
35.5%
|
| 4 | Undecided | 13 |
41.9%
|
| 98 | Don't know | 7 |
22.6%
|
| Sysmiss | 2992 |