| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1.Mandatory | 1 |
10%
|
| 2 | 2.Voluntary | 1 |
10%
|
| 6 | 6.Free | 8 |
80%
|
| 9 | 9.Missing | 0 |
0%
|
| Sysmiss | 421 |