| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 | very well (top of the class) | 
                                    
                    
                        | 2 | well (better than most syudents) | 
                                    
                    
                        | 3 | the same as other students | 
                                    
                    
                        | 4 | poorly | 
                                    
                    
                        | 5 | i dont know | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.