| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Last month | 19 |
38%
|
| 2 | 2. Less than 3 months ago | 15 |
30%
|
| 3 | 3. Less than 6 months ago | 6 |
12%
|
| 4 | 4. Less than a year ago | 4 |
8%
|
| 5 | 5. More than one year ago | 6 |
12%
|
| Sysmiss | 6531 |