| Value | Category | Cases | |
|---|---|---|---|
| 0 | 556 |
89%
|
|
| 1 | 44 |
7%
|
|
| 2 | 15 |
2.4%
|
|
| 3 | 4 |
0.6%
|
|
| 4 | 2 |
0.3%
|
|
| 5 | 2 |
0.3%
|
|
| 6 | 2 |
0.3%
|
|
| Sysmiss | 128 |