The top-earning 20 percent of Americans - those making more than $100,000 each year - received 49.4 percent of all income generated in the U.S., compared with the 3.4 percent earned by those below the poverty line, according to newly released census figures. That ratio of 14.5-to-1 was an increase from 13.6 in 2008 and nearly double a low of 7.69 in 1968.