In 1997, interest expense decreased $27.4 million, or 5%, as compared to 1996 as a result
of lower interest rates. Interest expense in 1996 decreased 2% compared with 1995 as a
result of lower average interest rates and lower average debt balances outstanding.
Minority interests in 1997 and 1996 relate primarily to the joint venture with Mobil
formed in August 1996.
On October 1, 1996, a subsidiary of the Corporation redeemed its $150 million, 10%
debentures and its $100 million, 101/8% debentures both due 2011. The Corporation recorded
a non-cash extraordinary item of $16.7 million (net of income tax of $10.3 million) related
to the unamortized discount on this early retirement of debt.