| Value | Category | Cases | |
|---|---|---|---|
| 0 | 13 |
10.7%
|
|
| 2 | 31 |
25.4%
|
|
| 3 | 63 |
51.6%
|
|
| 4 | 15 |
12.3%
|
|
| Sysmiss | 9 |