| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Cubic meters | 113 | 
                                                                 
                                    
                                    76.9%
                                 
                                                             | 
                                                        
                    
| 2 | Gallons | 3 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    
| 3 | Cubic feet | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 4 | Other | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 5 | Liters | 31 | 
                                                                 
                                    
                                    21.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 462 |