Average incomes (including realized capital gains) in top income groups in 2008 Income Groups Number of families Average income in each group Full Population 152,462,000 $54,315 Bottom 90% 137,215,800 $31,244 Top 10-5% 7,623,100 $127,184 Top 5-1% 6,098,480 $211,476 Top 1-0.5% 762,310 $443,102 Top 0.5-0.1% 609,848 $878,139 Top 0.1-0.01% 137,216 $3,238,386 Top 0.01% 15,246 $27,342,212