Assume the following. In 2008 , the U.S, had real GDP of $16.4 trillion and the CPI was at 90.68. At the end of 2018, real GDP in the U.S. Was $20.0 trillion and the CPI was at 104.22. Calculate the compounded (i.e., geometric) growth rate for this 10 -year period. (Use Excel to answer this question. Do not round intermediate calculations. Enter your answers as a percent'rounded to 2 decimal places.)