You have discovered that when the required rate of return on a bond you own fell by 0.50 percent from 9.75 percent, the fair present value rose from $975 to $995. The bond pays interest annually. What is the duration of this bond? Assume annual payments. (Do not round intermediate calculations. Round your answer to 2 decimal places. (e.g., 32.16))

Duration of this bond ______ Years