| Value | Category | Cases | |
|---|---|---|---|
| 1 | high | 982 | 
                                    
                                    21%
                                 | 
| 2 | normal | 1724 | 
                                    
                                    36.8%
                                 | 
| 3 | low | 1614 | 
                                    
                                    34.4%
                                 | 
| 4 | none, not in operation | 367 | 
                                    
                                    7.8%
                                 | 
| Sysmiss | 5422 |