Computation of Pro Forma Ratio of Earnings to Fixed Charges ------------------------------------------------------------------------- Nine Months Year ended Ended December 31, September 30, ------------------------------------------------------------------------- 1997 1998 ------------------------------------------------------------------------- Computation of Earnings ------------------------------------------------------------------------- ------------------------------------------------------------------------- After tax net income 84,449 88,473 ------------------------------------------------------------------------- Tax expense/(benefit (740) 168 ------------------------------------------------------------------------- Pre-tax net income 83,709 88,641 ------------------------------------------------------------------------- Equity earnings in subsidiary (5,724) (16,417) ------------------------------------------------------------------------- Interest expense 53,074 35,251 ------------------------------------------------------------------------- Net income before adjustments 131,059 107,475 ------------------------------------------------------------------------- Distributed equity earnings 9,588 12,248 ------------------------------------------------------------------------- Capitalized interest* -- (1153) ------------------------------------------------------------------------- Net income after adjustments 140,647 118,570 ------------------------------------------------------------------------- ------------------------------------------------------------------------- ------------------------------------------------------------------------- Fixed charges 53,074 35,251 ------------------------------------------------------------------------- ------------------------------------------------------------------------- Interest expense 53,074 35,251 ------------------------------------------------------------------------- Capitalized interest* -- -- ------------------------------------------------------------------------- Amortized expenses related to debt** -- -- ------------------------------------------------------------------------- Estimated interest associated with rental -- -- payments ------------------------------------------------------------------------- Preference security dividends of -- -- subsidiaries ------------------------------------------------------------------------- Total Fixed Charges 53,074 35,251 ------------------------------------------------------------------------- ------------------------------------------------------------------------- Pro forma ratio of earnings to fixed charges 2.65 3.36 ------------------------------------------------------------------------- * Immaterial ** Included in interest expense