| Value | Category | Cases | |
|---|---|---|---|
| 0 | no specifgic period | 3 |
20%
|
| 2 | 1 |
6.7%
|
|
| 3 | 1 |
6.7%
|
|
| 9 | 3 |
20%
|
|
| 12 | 6 |
40%
|
|
| 48 | 1 |
6.7%
|
|
| Sysmiss | 51293 |