5. Find data on GDP and its components, and compute the percentage of GDP for the following components for 1950, 1980, and the most recent year available.

a. Personal consumption expenditures

b. Gross private domestic investment

c. Government purchases

d. Net exports

e. National defense purchases

f. State and local purchases g. Imports Do you see any stable relationships in the data? Do you see any trends? (Hint: A good place to look for data is the statistical appendices of the Economic Report of the President, which is written each year by the Council of Economic Advisers. Alternatively, you can go to www.bea.gov, which is the Web site of the Bureau of Economic Analysis.)