Task: From the Bureau of Economic Analysis Web page (https://www.bea.gov), compare real GDP for 1960, 1970, 1980, 1990, and 2000.
(1) Show the percentage change in real GDP over each those decades.
(2) Do the percentages of GDP spent on consumption (C), investment (I), government (G), exports (X), imports ((M) differ significantly among those years?