2. Using monthly data from 1960 to the present, calculate and graph the total working-age population (called the civilian noninstitutional population), the number of employed workers, the number of unemployed workers, and the number of workers in the labor force. At the Web site of the Bureau of Labor Statistics, www.bls.gov/cps/cpsatabs.htm, find data and graph the labor force participation rate for the overall workingage population, and graph the labor force participation rates for males aged 20 and older and for females aged 20 and older. What are the major changes in these variables that have occurred over the postwar period?