About 15 percent of Americans, over 46 million, lived in households with incomes below the poverty line in 2010, $10,830 for single adult and $22,050 for a family of four. Poverty rates were higher in nonmetro then metro areas, and higher for Blacks and Hispanics than for whites. Some 20 million Americans were in deep poverty, defined as an income less than half the official poverty line. The US poverty rate fell sharply during the 1960s, and has stabilized since the mid-1970s