Exactly 11 years ago, you deposited $2440 into an account and promptly forgot about it. Today, you find the original confirmation letter while cleaning out your desk and decide to check your balance. After being put on hold for an hour with customer service and resetting your password twice, you find that your account has grown to $6116! What is your annual rate of return over the last 11 years? Submit your answer as a percentage and round to two decimal places (Ex. 0.00%).