EXCHANGE RATES FOR FIGURES IN THIS DIRECTORY

All figures appearing in the directory are listed in U.S. dollars. The year-end average exchange rates used for specified fiscal-year ends are: Australian dollar=$.782 (6/30/97), $.763 (6/30/96); Brazilian real=$.926 (12/31/97), $.99 (12/31/96); British pound=$1.638 (12/31/97), $1.56 (12/31/96); Canadian dollar=$.72 (12/31/97), $.733 (12/31/96); Danish krone=$.151 (12/31/97), $.172 (12/31/96); deutsche mark=$.625 (6/30/97), $.683 (6/30/96), $.575 (12/31/97), $.665 (12/31/96), $.698 (12/31/95); French franc=$.171 (12/31/97), $.196 (12/31/96); Italian lira=$.001 (12/31/97), $.001 (12/31/96); Japanese yen=$.008 (3/31/98), $.009 (3/31/97); Swedish krona=$.13 (12/31/97), $.149 (12/31/96); Swiss franc=$.689 (12/31/97); $.805 (12/31/96).