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<ARTICLE> 5
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-START> JAN-01-2000 APR-01-2000
<PERIOD-END> MAR-31-2000 JUN-30-2000
<CASH> 950 873
<SECURITIES> 0 0
<RECEIVABLES> 65,493 65,213
<ALLOWANCES> (6,561) (5,942)
<INVENTORY> 0 0
<CURRENT-ASSETS> 75,016 74,615
<PP&E> 291,025 306,571
<DEPRECIATION> (122,011) (124,511)
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<CURRENT-LIABILITIES> 72,901 59,286
<BONDS> 0 0
831 831
0 0
<COMMON> 0 0
<OTHER-SE> 112,534 117,110
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<SALES> 112,799 120,144
<TOTAL-REVENUES> 112,799 120,144
<CGS> 0 0
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<INTEREST-EXPENSE> 899 1,033
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<INCOME-TAX> 1,488 2,926
<INCOME-CONTINUING> 2,327 4,576
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<EPS-BASIC> 0.28 .55
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</TABLE>