| Value | Category | Cases | |
|---|---|---|---|
| 0 | 9 |
22.5%
|
|
| 1 | 15 |
37.5%
|
|
| 2 | 10 |
25%
|
|
| 3 | 4 |
10%
|
|
| 8 | 1 |
2.5%
|
|
| 20 | 1 |
2.5%
|
|
| Sysmiss | 521 |