section 15 prices this presents indexes of producer and consumer actual for se lected 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 tinuous statistical series published by it designed to measure average changes in received producers all at stages proces sing produced united states has undergone several re visions see febru ary 1962 april 1978 august 1988 now based on approximately 3 200 commodity 80 000 quota tions per month net output manufacturing mining industries have been added recent years used constructing col sellers generally apply first significant large volume commer cial transaction each
