| Value | Category | Cases | |
|---|---|---|---|
| 0 | 18 |
2.2%
|
|
| 1 | 19 |
2.4%
|
|
| 2 | 64 |
7.9%
|
|
| 3 | 265 |
32.9%
|
|
| 4 | 440 |
54.6%
|
|
| Sysmiss | 889 |