| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 6 months ago, | 76 |
11%
|
| 2 | Between 6 months and a year ago | 85 |
12.3%
|
| 3 | between a year and 2 years ago | 135 |
19.5%
|
| 4 | Between 2 years and 3 years ago | 397 |
57.3%
|
| Sysmiss | 1307 |