The Demographic Statistical Atlas of the United States

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Map of Household Income by Tract in ZIP Code 19902

Median household income ($):

$39,500		$40,500		$41,400		$42,300		$43,200		$44,100

20th percentile of household income ($):

$18,500		$21,300		$24,100		$26,900		$29,700		$32,600

Mean household income of the top 5% of households ($):

$155k		$184k		$212k		$240k		$268k		$297k

Gini Index of income inequality (larger Gini Index means more inequality) (%):

31.9%		35.4%		38.9%		42.4%		45.9%		49.4%

Household Income: total income from all people in the household
Median: in terms of income, it is the income for which 50% of households have a lower income, and 50% have a higher income
Percentile: for example, the 80th percentile of household income is the income for which 80% of household have a lower income and 20% have a higher income
Quintile: a quintile is 20% of a population, grouped by percentile; for example, the 2nd quintile is all members of a population between the 20th and 40th percentiles
Gini Index: a statistical measure of how unevenly income is distributed in a population (ranging from 0% to 100%, the higher the number, the greater the inequality)

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