Before 2002, most Economic Census data was released as official Census Bureau publications. The publications are available on the Publications page within the Library section of this site. 2012 - 2017 datasets are also available by FTP.
For more information, see the Comparing Historical Data page within the Guidance section of this site.
1947 - 1992 Economic Census Manufacturing Concentration Ratios
View and download the table for 1947 - 1992 Economic Census Manufacturing Concentration Ratios.
1992 Island Areas
View tables for the 1992 Economic Census of Island Areas for Puerto Rico, including tables on Manufactures, Construction, Wholesale, Retail, & Services sectors.