| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 2 |
15.4%
|
| 2 | no | 1 |
7.7%
|
| 18 | 1 |
7.7%
|
|
| 19 | 5 |
38.5%
|
|
| 20 | 1 |
7.7%
|
|
| 21 | 3 |
23.1%
|
|
| Sysmiss | 377 |