| Value | Category | Cases | |
|---|---|---|---|
| 1 | high | 1041 |
22.2%
|
| 2 | normal | 1981 |
42.3%
|
| 3 | low | 1326 |
28.3%
|
| 4 | none, not in operation | 339 |
7.2%
|
| Sysmiss | 5422 |