| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 0 | No specific period | 2 | 4933 |
17.1%
|
| 3 | 1 | 2378 |
8.2%
|
|
| 9 | 3 | 8325 |
28.9%
|
|
| 12 | 3 | 10572 |
36.7%
|
|
| 48 | 1 | 2627 |
9.1%
|
|
| Sysmiss | 10906 | 31739082 |