section 14 prices this presents indexes of producer and consumer actual for selected commodities energy the primary sources these data are monthly publications department labor bureau statistics bls which include review con sumer price index detailed report pro ducer us import export commerce economic analysis is source gross domestic product measures ppi dating from 1890 oldest continu ous statistical series published by it designed to measure average changes in received producers all at stages processing produced united states has undergone several revi sions see february 1962 april 1978 august 1988 now based on approximately 10 000 indi vidual products groups along with about 100 quotations per month net output manufacturing mining industries have been added recent years used constructing col lected sellers generally apply first significant large volume commer cial transaction
