<ARTICLE>                     5
<MULTIPLIER>                                   1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              Dec-31-1997
<PERIOD-END>                                   Mar-31-1997
<CASH>                                         1,060,200
<SECURITIES>                                   0
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<PP&E>                                         21,870,300
<DEPRECIATION>                                 11,256,000
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<CURRENT-LIABILITIES>                          3,157,100
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<PREFERRED-MANDATORY>                          11,800
<PREFERRED>                                    0
<COMMON>                                       1,091,300
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<TOTAL-LIABILITY-AND-EQUITY>                   16,955,000
<SALES>                                        0
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<CGS>                                          0
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<EPS-PRIMARY>                                  .67
<EPS-DILUTED>                                  .67