Important Information

Annual Revisions

Each year, historical labor force estimates are revised to reflect new Census Bureau population controls, updated input data, and reestimation. The model-based estimates also incorporate new seasonal adjustment, and the unadjusted estimates are controlled to new census division and U.S. totals. Substate area data are revised to incorporate updated inputs, reestimation, and controlling to new statewide totals.

Modeled Areas

On February 28, 2014, the Local Area Unemployment Statistics (LAUS) program released 2013 annual average labor force estimates for census regions and divisions; all States and the District of Columbia; the Los Angeles-Long Beach-Glendale, CA Metropolitan Division, the Miami-Miami Beach-Kendall, FL Metropolitan Division, the Chicago-Joliet-Naperville, IL Metropolitan Division, the Detroit-Warren-Livonia, MI Metropolitan Statistical Area, New York city, NY, the Cleveland-Elyria-Mentor, OH Metropolitan Statistical Area, and the Seattle-Bellevue-Everett, WA Metropolitan Division, as well as the seven corresponding balance-of-State areas. As described above, the data incorporate new population controls, updated inputs, reestimation of models, and adjustment to new census division and national control totals. Both not-seasonally-adjusted and smoothed-seasonally-adjusted (SSA) monthly data were revised back to January 2009. (For more information about SSA, please see the question and answer page.) The updated population controls reflect U.S. Census Bureau revisions from April 2010 forward.

Statewide SSA data for Puerto Rico were revised back to 2009 to incorporate updated seasonal factors. Not-seasonally-adjusted data for Puerto Rico are tabulated from a household survey and generally are not subject to historical revision.

All annual average and historical supplemental items on the website containing data for model-based areas, including data files, rank tables, and maps, were updated on February 28 to reflect these revisions.

Substate Areas

On April 18, 2014, routine revisions were made to data from 2009 through 2013 for geographic areas below the State level (other than the model-based areas noted above), and official annual averages for 2013 were issued. For many substate areas, at least some estimation inputs were revised back to 2010, while the revisions for 2009 consisted of controlling to the new State totals described above. The extent and scope of the substate data revisions were footnoted within the time-series database. Furthermore, all supplemental items on the website containing data for substate areas were updated to reflect these revisions.


On May 28, 2014, mostly minor corrections were made to January and February 2014 civilian labor force and unemployment estimates for all substate areas in Nevada, as well as the Sacramento--Arden-Arcade--Yuba City, CA-NV Combined Statistical Area.


Last Modified Date: May 28, 2014