What was the impact on interest expense of the company's decision to use receive-fixed, pay-floating interest swaps in 2002, 2003, 2004 and 2005? What would have been the additional earnings impact in 2004 had the swaps been entered into but not qualified for hedge accounting treatment? Assess the interest rate environment in 2000 through 2005. Assess the potential reasons for and the soundness of Wal-Mart's use of interest rate swaps in light of the interest rate environment? How well do Wal-Mart's disclosures inform analysts and investors about its interest rate risk exposure?]