| Value | Category | Cases | |
|---|---|---|---|
| 0 | 509 |
93.9%
|
|
| 1 | 16 |
3%
|
|
| 2 | 11 |
2%
|
|
| 3 | 3 |
0.6%
|
|
| 4 | 1 |
0.2%
|
|
| 8 | 1 |
0.2%
|
|
| 20 | 1 |
0.2%
|
|
| Sysmiss | 19 |