               
                        
        
                                                                                          
                                                                                                                                                                                                                                                                                                                                
                                                               
                                                                                                                                         
                                                                                  
                                                                                                                                                                                              
                                                                                                                                                               
                     
 
                                                     
                                                                                                                 

 
                                                
                                                                                         
                                                         
                                                                                                      
                                                                                                            
 
                                   
                                                                                                           
                                                                             
                                                   
            
            
         2012       6               
          