Bureau of Mines1 dataset
Through 1994, U.S. Bureau of Mines;
thereafter, U.S. Geological Survey, Mineral Commodity Summaries and Minerals
Yearbook, annual and Historical Statistics for Mineral and Material Commodities in the United States;
import and export data from U.S. Bureau of the Census.
referenced on dataset section Data (#1)
Free Download — The Statistical Abstract files are distributed by the US Census Department as Microsoft Excel files. These files have data mixed with notes and references, multiple tables per sheet, and, worst of all, the table headers are not easily matched to ...