The growing innumeracy in our nation makes comparisons of economic growth or well-being almost impossible to understand to the vast majority of citizens. The most important number is the inflation-adjusted net disposable income (after taxes) per capita. This tells is if the average american is experiencing an increase in financial well-being or a decrease. Also, splitting the nation into the five income quintiles and giving the number for each provides a measure of income distribution across the classes from poor to rich. There is no perfect measure, but these values would get closer. And stay away from percentages. A middle class family losing or gaining $200 per year in net per-capita income is more meaningful to them than saying that they lost or gained 0.8%.