Your portfolio had the values in the table below for the four years listed. There were no withdrawals or contributions of new funds to the portfolio. Calculate your average return over the $4-$year period. $($Click on the icon here in order to copy its contents of the data table below into a spreadsheet.$)$

$\backslash$table$[[,$Beginning Value,Ending Value$],[2016,$$$59,160,$$$55,228$