Another Classic Example of Gaussian Distribution :
“During eight years of the Bush Administration, the 400 richest Americans, who now own more than the bottom 150 million Americans, increased their net worth by $700 billion. In 2005, the top one per cent claimed 22 per cent of the national income, while the top ten per cent took half of the total income, the largest share since 1928.
“Over 40 per cent of GNP comes from Fortune 500 companies. According to the World Institute for Development Economics Research, the 500 largest conglomerates in the U.S. “control over two-thirds of the business resources, employ two-thirds of the industrial workers, account for 60 per cent of the sales, and collect over 70 per cent of the profits.”
… In 1955, IRS records indicated the 400 richest people in the country were worth an average $12.6 million, adjusted for inflation. In 2006, the 400 richest increased their average to $263 million, representing an epochal shift of wealth upward in the U.S.” (“Wealth Inequality destroys US Ideals” Don Monkerud, consortiumnews.com)