        
                                                                                                                                                                                                                                                         
                                                                                                                                 
                                                                                                                                                                                         10           8                                                                            
                               1976                                                                                                                                                                                                                                                                    3.8      
                                                 1.5                                                                                                                                                                                                                          
                                                                                                              
                                                                                                                                                                                       
                                                                                     
                                                                                 