| Value | Category | Cases | |
|---|---|---|---|
| 1 | This past week | 1 |
3.6%
|
| 2 | This past month | 7 |
25%
|
| 3 | In the past three months | 14 |
50%
|
| 4 | In the past six months | 4 |
14.3%
|
| 5 | In the past year | 1 |
3.6%
|
| 6 | More than one year ago | 1 |
3.6%
|
| Sysmiss | 173 |