         
                                                   
  1.      
                                                                                                                                                                1989                                                                                                                                                                                                                                                                                                                                                                                                           
2.       
                                                                                                                                                                                                                                                                                                                                                                                                                                         20--30                                                                                                                                                                                                                                                                                                                        
3.        
                14                                                                                                                                                                                                                                                     