15 years ago, your aunt Furtsy set aside $9,500 to help fund your college education. She has made no other deposits since then. Today, that investment is valued at $52,243 and she has given you access the funds. What annual rate of return did your aunt earn on this account? (NOTE: Round your answer to two decimal places and report it as a percent: for 1.55% you would write 1.55)