| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Days | 64 | 59 |
3.3%
|
| 2 | Weeks | 102 | 95 |
5.4%
|
| 3 | Months | 824 | 769 |
43.5%
|
| 4 | Years | 882 | 828 |
46.9%
|
| 9 | Special answers | 18 | 16 |
0.9%
|
| Sysmiss | 9649 | 9555 |