| Value | Category | Cases | |
|---|---|---|---|
| 1 | School closure | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 2 | Accident | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 3 | Fire | 3 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2654 | 
                                                                 
                                    
                                    99.8%
                                 
                                                             |