New figures from the Internal Revenue Service show that income disparities grew substantially from 2002 to 2003. After adjusting for inflation, the after-tax income of the one percent of households with the highest incomes shot up in 2003 by an average of nearly $49,000 per household while the after-tax incomes of the bottom 75 percent of households fell on average. The term "household" here refers to tax filers with positive amounts of adjusted gross income.