| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3 |
0.5%
|
|
| 1 | 18 |
2.8%
|
|
| 2 | 41 |
6.4%
|
|
| 3 | 118 |
18.5%
|
|
| 4 | 459 |
71.8%
|
|
| Sysmiss | 2807 |