| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than a week | 18 |
27.7%
|
| 2 | A week to less than a month | 28 |
43.1%
|
| 3 | A month or longer | 17 |
26.2%
|
| 98 | Don't know | 2 |
3.1%
|
| Sysmiss | 41947 |