| Value | Category | Cases | |
|---|---|---|---|
| 1 | Last month | 1 |
7.7%
|
| 2 | 1-6 months ago | 6 |
46.2%
|
| 3 | 6-12 months ago | 4 |
30.8%
|
| 4 | More than a year ago | 2 |
15.4%
|
| 9 | Missing | 0 |
0%
|
| Sysmiss | 804 |