| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 0 | No specific period | 1 | 2322 |
3.7%
|
| 6 | 4 | 7594 |
12.2%
|
|
| 8 | 1 | 1668 |
2.7%
|
|
| 9 | 6 | 14134 |
22.8%
|
|
| 12 | 12 | 27191 |
43.8%
|
|
| 24 | 2 | 3606 |
5.8%
|
|
| 36 | 1 | 1967 |
3.2%
|
|
| 60 | 1 | 1556 |
2.5%
|
|
| 72 | 1 | 1991 |
3.2%
|
|
| Sysmiss | 15000 | 29856041 |