| Value | Category | Cases | |
|---|---|---|---|
| 1 | Involved, Important | 8815 |
17.4%
|
| 2 | Involved, Not Important | 2007 |
4%
|
| 3 | Not Involved | 15876 |
31.3%
|
| 4 | Method Not Applicable | 24087 |
47.4%
|
| Sysmiss | 7091 |