| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
33.3%
|
|
| 20 | 1 |
33.3%
|
|
| 21 | 1 |
33.3%
|
|
| 999 | REFUSED | 0 |
0%
|
| Sysmiss | 20921 |