A5 the results of the 1970 census pour from the Government's computers, population analysts are finding an astonishing number of encouraging trends for the nation's economy. Almost everybody stands to become more prosperous in the next few years and beyond. Census Bureau officials calculate that the median income of the U.S. family, measured in dollars of constant buying power, will rise from $8,600 in 1969 to $10,900 by the beginning of 1975. Then the figure will continue upward, to $14,700 by 1985. Says the bureau's director, George Hay Brown: "We are heading into a society with an affluent majority."
Brown's forecast assumes,...