You have been asked to determine the historical average annual rate of return on Stock A. Stock A had a return of 14.5% in 2020 , a return of 6.5% in 2019 , a return of 12.6% in 2018 , a return of 16.3% in 2017 and a return of 21.9% in 2016 . Based on this information what was Stock A's historical average annual rate of return? Your answer should be shown as a percentage and it should be accurate to two decimal places