. we evaluate these assumptions with our actuarial advisors and we believe they are within accepted industry ranges , although an increase or decrease in the assumptions or economic events outside our control could have a direct impact on reported net earnings . the pre-retirement discount rate for each plan used for determining future net periodic benefi t cost is based on a review of highly rated long-term bonds . for fi scal 2008 , we used a pre-retirement discount rate for our domestic plans of 6