ACS Profile/Trends Reports Now Access 2010-2012 3-Year Data

The latest data from the American Community Survey has been converted to create the MCDC's standard profile data set for 2010-2012 (3-year data only). The ACS Profiles and its twin application, ACS Trends have been updated to incorporate access to these new data. The data set is also accessible in the ACS public data archive, using Dexter. There is a link to the Dexter access query form within the "Other formats" box on the profile report page.

Note that this does not effect any applications (such as the ACS version of CAPS or the ACS Profile extract app) which make use of 5-year period estimates. Those estimates are scheduled for release in December (the 17th).

The following paragraph is a repeat of what was posted here in October when we announced the release of the new 1-year data.

There have been substantial revisions to the code used to generate the profiles this cycle. We have looked for alternate tables with the same required information but with less data suppression (e.g. replacing reference to a "B" table with the corresponding "C" table, if one exists and has the necessary detail). The good news is that you should find fewer suppressed data items in these extracts; the bad news is that it is new code, and thus does have a greater risk of bugs and/or inconsistency with prior definitions. You may want to run a trends report for an area you know well and compare the values to see if there are any improbable jumps in the data.

New Base Tables Data from the 2010-2012 American Community Survey

The MCDC has downloaded and converted the new 3-year ACS base (aka "detailed" or "summary") tables as recently published by the Census Bureau. These data can be accessed (via the Uexplore/Dexter interface) in the basetbls subdirectory of the acs2012 data directory.

As we have been doing for several years now, we have partitioned these data into a dozen data sets. We divide the data into six "topic groups" (see the TableTopicCodes.txt file for details), and we keep estimates and margin-of-error data in separate data sets. Each of the twelve data sets contains data for the same 15,129 geographic areas -- those that meet the Bureau's 20,000 population threshold. The tables and the geographic areas summarized will be very similar (but not identical) to the comparable tables for 2011. Note that we have updated the Datasets.html file in the acs2012/basetbls directory to assist you in navigating both the 1- and 3-year data. The 5-year data for 2008-2012 is expected to be added to this directory very late this year.