In this exercise, we see the cumulative effects of inflation. Refer to the CPI table. Find the three-year Innation rate from December 1973 to December 1976. (Round your answer to one decimal place.) X% 1971 1972 1973 1974 1975 1976 1977 1978 1979 39.8 41.1 42.5 46.2 51.9 55.5 58.2 62.1 67.7 76.7 5.6% 3.3% 3.4% 8.7% 12.3% 6.9% 4.9% 6.7% 9.0% 13.3% 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 201.8 210.0 210.2 215.9 219.2 225.7 229.6 233.0 234.8 236.5 2.5% 4.1% 0.1% 2.7% 1.5% 3.0% 1.7% 1.5% 0.8% 0.7%