<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                                     
<PERIOD-TYPE>                                                       3-MOS      
<FISCAL-YEAR-END>                                                  DEC-31-1996
<PERIOD-START>                                                      JAN-01-1996
<PERIOD-END>                                                        MAR-31-1996
<CASH>                                                                 345,713
<SECURITIES>                                                               0 
<RECEIVABLES>                                                          212,149     
<ALLOWANCES>                                                              0    
<INVENTORY>                                                            194,042      
<CURRENT-ASSETS>                                                       765,312
<PP&E>                                                               2,997,804 
<DEPRECIATION>                                                       1,317,232        
<TOTAL-ASSETS>                                                       2,928,238        
<CURRENT-LIABILITIES>                                                  247,325     
<BONDS>                                                                815,187        
<COMMON>                                                                39,743     
<PREFERRED-MANDATORY>                                                   49,651     
<PREFERRED>                                                            136,798      
<OTHER-SE>                                                             964,328      
<TOTAL-LIABILITY-AND-EQUITY>                                         2,928,238        
<SALES>                                                                468,883 
<TOTAL-REVENUES>                                                       468,883        
<CGS>                                                                  260,006        
<TOTAL-COSTS>                                                          305,211      
<OTHER-EXPENSES>                                                       (80,149)   
<LOSS-PROVISION>                                                           0    
<INTEREST-EXPENSE>                                                      18,347    
<INCOME-PRETAX>                                                        204,523     
<INCOME-TAX>                                                            75,674     
<INCOME-CONTINUING>                                                    112,905     
<DISCONTINUED>                                                             0   
<EXTRAORDINARY>                                                            0
<CHANGES>                                                                  0  
<NET-INCOME>                                                           112,905    
<EPS-PRIMARY>                                                            $2.59  
<EPS-DILUTED>                                                            $2.53