“The Statistical Abstract of the United States, published since 1878, is the authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States.”
Top 5 Data Links:

• Statistical Abstract of the United States 2008
• 12 – Resident Population–States: 1980 to 2006 [Excel 50k] | [PDF 460k]
• 7 – Resident Population by Age and Sex: 1980 to 2006 [Excel 61k] | [PDF 456k]
• 696 – Top Wealth Holders With Gross Assets of $675,000 or More by Type of Property, Sex, and Size of Net Worth: 2001 [Excel 31k] | [PDF 466k]
• 702 – Purchasing Power of the Dollar: 1980 to 2006 [Excel 42k] | [PDF 462k]
• 74 – Self-Described Religious Identification of Adult Population: 1990 and 2001 [Excel 28k] | [PDF 458k]<