                                                      4 7        4 6                                 19.20.23             20       5         5                                                                                                         
                                                                                                                             
                                                                                                                                                                                            
                                                             
                                                                                                                                                                                                         
         
          
         
                                                                                    
                                                                                                                                                            
          19                         
 
               2009  2 17        22    