| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. More than 6 years ago | 5 |
21.7%
|
| 2 | 2. Between 3 and 6 years | 13 |
56.5%
|
| 3 | 3. Less than 3 years ago | 5 |
21.7%
|
| 9 | 9. Don t know | 0 |
0%
|
| Sysmiss | 76 |