us census bureau statistical abstract of the united states 2000 labor force employment and earnings 399 section 13 this presents statistics on its distribution by occupation industry affiliation supply demand for conditions chief source these data is current population survey cps conducted bls comprehensive his torical are available from internet site http stats gov cpshome htm published a basis monthly publication detailed also s decen nial types most in obtained two methods household interviews or questionnaires reports establishment payroll records each method provides which other cannot suitably popula tion characteristics example readily obtainable only while industrial classifica tions can be derived sample