us census bureau statistical abstract of the united states 1999 prices 491 section 15 this presents indexes producer and consumer actual for se lected commodities energy primary sources these data are monthly publications department labor statistics bls which include review con sumer price index detailed report pro ducer import export commerce economic analysis is source gross domestic product measures ppi dating from 1890 oldest continuous series published by it de signed to measure average changes in received producers all com modities at stages processing duced has undergone several revisions see february 1962 april 1978 august 1988 now based on approximately 10 000 individual products groups along with about 100 quotations per month net output manufactur ing mining industries have been added recent years used constructing collected
