| Value | Category | 
                                    
                    
                        | 1 | dont know at all | 
                                    
                    
                        | 2 | a little bit | 
                                    
                    
                        | 3 | can use for everyday situations | 
                                    
                    
                        | 4 | know very well | 
                                    
                    
                        | 9 | not sure | 
                            
            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.