Historical Statistics of the United States
Expanded and rev. ed. of: Historical statistics of the United States, colonial times to 1970. Bicentennial ed. Washington : U.S. Dept. of Commerce, Bureau of the Census, 1975. – "Many [data] series in these volumes are continued on a regular basis with periodic updates and revisions by the agency, group, or individual responsible for the original data."--Guide to the Millennial ed.
Statistical Abstract of the United States (annual; 1878 onwards)
An "authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States. Sources of data include the Census Bureau, Bureau of Labor Statistics, Bureau of Economic Analysis, and many other Federal agencies and private organizations." Although the central focus of this Website is the most recent annual edition, it also provides links to PDF files of the earlier annual editions, going back to the first in 1878.