| Value | Category |
|---|---|
| 1 | no changes |
| 2 | new member |
| 3 | died |
| 4 | Gone temporarily to other country |
| 5 | Gone temporarily within the country |
| 6 | Gone permanently to other country |
| 7 | Gone permanently within the country |
| 8 | Returned from other country |
| 9 | Returned within the country |
| Sysmiss |