In 2005, the average price of electricity was 10.0 cents per kWh (kilowatt-hour), and in 2015, the average price was 13.8 cents per kWh. Compare the increase in the price of electricity to the increase in price 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 Year 1976 1996 1977 1997 1978 1979 1980 1981 1982 1983 1984 1985 CPI 56.9 60.6 65.2 72.6 82.4 90.9 96.5 99.6 103.9 107.6 Year 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 CPI 109.6 113.6 118.3 124.0 130.7 136.2 140.3 144.5 148.2 152.4 1998 1999 2000 2001 2002 2003 2004 2005 CPI 156.9 160.5 163.0 166.6 172.2 177.1 179.9 184.0 188.9 195.3 Year 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 CPI 201.6 207.3 215.3 214.5 218.1 224.9 229.6 233.0 236.7 237.0