The average annual cost (tuition, fees, and room and board) at four-year private colleges rose from $5600 in 1980 to $43,921 in 2015. Compare the increase in the cost of college to the increase in cost corresponding to the CPI.

Consumer Price Index. In Exercises, use the Consumer Price Index values from Table 2.2.

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TABLE 2.2 Average Annual Consumer Price Index (1982–1984 = 100) Year CPI Year CPI Year CPI Year CPI 1976 56.9 1986 109.6 1996 156.9 2006 201.6 1977 60.6 1987 113.6 1997 160.5 2007 2073 1978 65.2 1988 118.3 1998 163.0 2008 215.3 1979 72.6 1989 124.0 1999 166.6 2009 214.5 1980 82.4 1990 130.7 2000 172.2 2010 218.1 1981 90.9 1991 136.2 2001 177.1 2011 224.9 1982 96.5 1992 140.3 2002 179.9 2012 229.6 1983 99.6 1993 144.5 2003 184.0 2013 233.0 1984 103.9 1994 148.2 2004 188.9 2014 236.7 1985 107.6 1995 152.4 2005 195.3 2015 237.0