The U.S. Census Bureau has provided public use microdata as a component of its decennial census data products since 1963 when we released a one-in-one-thousand sample file for the 1960 Decennial Census. Since then, microdata files have become an integral part of our decennial census and demographic surveys programs. As a result, researchers in other Government agencies and research institutes have been able to conduct important policy and planning studies that could not be answered through the use of published tabulations. Were it not for public use microdata files, the only way these studies could be done, if at all, would be by contracting with the Census Bureau for special tabulations.