This version plots the same data, but indexes dissimilar measures (share of income, hourly wages, gini index) to a common scale. Choose either 1947 or 1979 as the index year.  All measures are pegged at a value of 100 in the index year.  Subsequent data points can be read as a percentage change over time.  When the share of income going to the top one percent (the red line on the graph below), for example, is indexed to 1979, the 2012 value indicates a percentage increase since 1979--in this case about 117 percent.