You deposited $108 into an account 19 years ago to save for college tuition. Today, that account is worth $138. What annual rate of return did you earn on this account? Compute no other deposits, no withdrawals, and annual compounding. Please enter your answer as a PERCENT rounded to 2 decimal places. For example, if your answer is 6.23%, enter 6.23, instead of 0.0623.