| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Industrial activities | 1 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 2 | Waste burning | 5 | 3 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 3 | Transportation | 14 | 20 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 4 | Construction | 1 | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                            
                        
                        
                            
                    
| 5 | Other | 2 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                            
                        
                        
                            
                    
| Sysmiss | 2691 | 2686 |