| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 |
5.9%
|
|
| 1 | The last three years | 30 |
58.8%
|
| 2 | The last five years | 12 |
23.5%
|
| 3 | The last ten years | 6 |
11.8%
|
| 4 | Over ten years | 0 |
0%
|
| Sysmiss | 29878 |