| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1-12 months ago | 21 |
35%
|
| 2 | 2 years ago | 7 |
11.7%
|
| 3 | 3 years ago | 11 |
18.3%
|
| 4 | 4 years ago | 9 |
15%
|
| 5 | 5 years ago or more | 12 |
20%
|
| 9 | Do not know, do not remember | 0 |
0%
|
| Sysmiss | 2776 |