<ARTICLE> OPUR1
<CIK> 0000318819
<NAME> R. D. SIEVERS
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<BOOK-VALUE>                                  PER-BOOK
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<TOTAL-CURRENT-ASSETS>                         196,919
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<OTHER-ASSETS>                                  36,712
<TOTAL-ASSETS>                               3,889,946
<COMMON>                                        97,174
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<TOTAL-COMMON-STOCKHOLDERS-EQ>               1,013,799
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<PREFERRED>                                     17,958
<LONG-TERM-DEBT-NET>                         1,563,988
<SHORT-TERM-NOTES>                             230,742
<LONG-TERM-NOTES-PAYABLE>                            0
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<LEASES-CURRENT>                                     0
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<INCOME-TAX-EXPENSE>                            27,255
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<NET-INCOME>                                    43,536
<PREFERRED-STOCK-DIVIDENDS>                      1,992
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<COMMON-STOCK-DIVIDENDS>                        23,989
<TOTAL-INTEREST-ON-BONDS>                       59,479
<CASH-FLOW-OPERATIONS>                          62,869
<EPS-PRIMARY>                                      .59
<EPS-DILUTED>                                        0