fixed rate notes due march 2018 , interest equal to 4.40% ( 4.40 % ) ( 2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612.5 ( 1 ) in september 2008 , the company entered into an interest rate swap agreement that modified the variable interest obligation associated with this loan so that the interest payable effectively became fixed at a rate of 4.72% ( 4.72 % ) beginning with the interest accrued after october 22 , 2008