<TABLE> <S> <C>
<PAGE>
<ARTICLE> 7
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<DEBT-HELD-FOR-SALE> 8,557,261
<DEBT-CARRYING-VALUE> 0
<DEBT-MARKET-VALUE> 0
<EQUITIES> 617,076
<MORTGAGE> 0
<REAL-ESTATE> 0
<TOTAL-INVEST> 9,174,337
<CASH> 931,502
<RECOVER-REINSURE> 135,047
<DEFERRED-ACQUISITION> 325,392
<TOTAL-ASSETS> 16,368,953
<POLICY-LOSSES> 5,369,143
<UNEARNED-PREMIUMS> 1,776,193
<POLICY-OTHER> 1,169,487
<POLICY-HOLDER-FUNDS> 0
<NOTES-PAYABLE> 450,030
0
0
<COMMON> 1,243
<OTHER-SE> 5,565,324
<TOTAL-LIABILITY-AND-EQUITY> 16,368,953
1,537,819
<INVESTMENT-INCOME> 399,591
<INVESTMENT-GAINS> 74,808
<OTHER-INCOME> 8,835
<BENEFITS> 969,374
<UNDERWRITING-AMORTIZATION> 349,384
<UNDERWRITING-OTHER> 269,011
<INCOME-PRETAX> 494,966
<INCOME-TAX> (11,266)
<INCOME-CONTINUING> 139,461
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 139,461
<EPS-BASIC> 4.08
<EPS-DILUTED> 4.02
<RESERVE-OPEN> 0
<PROVISION-CURRENT> 0
<PROVISION-PRIOR> 0
<PAYMENTS-CURRENT> 0
<PAYMENTS-PRIOR> 0
<RESERVE-CLOSE> 0
<CUMULATIVE-DEFICIENCY> 0
</TABLE>