A pass-through with a PSA of 125 has an initial price of 91.2430 and yield of .0900. If the yield increases by 25 basis points and the PSA slows to 100, the price declines to 89.1801. If the yield decreases by 25 basis points and the PSA increases to 150, the prices increases to 93.0894 per 100% par value. Calculate the effective duration for this pass-through. [Round your answer to two digits to the right of the decimal]