| Value | Category | Cases | |
|---|---|---|---|
| 1 | high | 35 |
13.6%
|
| 2 | average | 47 |
18.3%
|
| 3 | low | 109 |
42.4%
|
| 4 | none: not in operation | 66 |
25.7%
|
| Sysmiss | 1525 |