| Value | Category | 
                                    
                    
                        | 0 | Water | 
                                    
                    
                        | 1 | No or Slight Constraint | 
                                    
                    
                        | 2 | Moderate Constraint | 
                                    
                    
                        | 3 | Severe Constraint | 
                                    
                    
                        | 4 | Very Severe Constraint | 
                                    
                    
                        | 5 | Mainly Non-Soil | 
                                    
                    
                        | 6 | Permafrost | 
                                    
                    
                        | 7 | Water | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.