| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, with back up supply | 239 | 
                                                                 
                                    
                                    50.2%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, without backup | 82 | 
                                                                 
                                    
                                    17.2%
                                 
                                                             | 
                                                        
                    
| 3 | No | 155 | 
                                                                 
                                    
                                    32.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 38 |