| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 154 |
22.3%
|
| 1 | 1 | 303 |
43.8%
|
| 2 | 2 | 191 |
27.6%
|
| 3 | 3 | 44 |
6.4%
|
| Sysmiss | 2949 |