(Solving for interest rate) In September 1963, the first issue of the comic book X-MEN was issued. The original price for that issue was $0.15. By September 2018, 55 years later, the value of the near-mint copy of this comic book had risen to $32,500. What annual rate of interest would you have earned if you had bought the comic in 1963 and sold it in 2018?

The annual rate of interest you would have earned is ________%. (Round to two decimal places.)