<ARTICLE> 5
<RESTATED> 
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<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998
<PERIOD-START>                             JAN-01-1998             JAN-01-1998
<PERIOD-END>                               MAR-31-1998             JUN-30-1998
<CASH>                                          37,525                  62,420
<SECURITIES>                                         0                       0
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<DEPRECIATION>                                 525,868                 547,470
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<CURRENT-LIABILITIES>                          334,482                 306,748
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<PREFERRED>                                          0                       0
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<OTHER-SE>                                   1,200,491               1,232,125
<TOTAL-LIABILITY-AND-EQUITY>                 2,642,142               2,726,024
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<CGS>                                                0                       0
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<OTHER-EXPENSES>                                30,180                  60,651
<LOSS-PROVISION>                                10,028                  17,330
<INTEREST-EXPENSE>                              10,682                  22,148
<INCOME-PRETAX>                                 64,894                 112,856
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<EPS-PRIMARY>                                     0.44                    0.77
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