<ARTICLE>                                          5
                                                    
                                                
<PERIOD-TYPE>                                      6-MOS
<FISCAL-YEAR-END>                                  DEC-31-1998
<PERIOD-START>                                     JAN-1-1998
<PERIOD-END>                                       JUN-30-1998

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<SECURITIES>                                                         0
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<ALLOWANCES>                                                  (542,689)
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<DEPRECIATION>                                            (223,976,595)
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<SALES>                                                    $72,605,502
<TOTAL-REVENUES>                                           $72,605,502
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