TreeTop Inc. bonds was issued on Oct 15^th, 2010. The bonds have a coupon rate of 8.5%, with interest paid annually. The par value of the bonds is $1,000 and the maturity is Oct 15^th, 2052. If the market price of one contract of TreeTop bond on Oct 15^th, 2020 is $1,187, what is the annual interest rate to be earned by an investor who bought it on Oct 15^th, 2020 at the said market price and plan to hold on to the bond till maturity?

Round to the 0.01%, i.e., two decimal places. Enter your answer in the form of a percentage. For example, if your answer is "12.34%", enter "12.34".