Suppose we observe the 3-year Treasury security rate (1R3) to be 5 percent, the expected 1-year rate next year—E(2r1)—to be 5 percent, and the expected 1-year rate the following year—E(3r1)—to be 5 percent. If the unbiased expectations theory of the term structure of interest rates holds, what is the 1-year Treasury security rate, 1R1? (Round your answer to 2 decimal places.)