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 or shortly after February 28 to reflect these revisions. Unless otherwise noted, monthly supplemental items for States in December 2013 also were replaced.

Substate Areas

On April 18, 2014, routine revisions will be 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 will be issued. For all substate areas, estimation inputs will be revised back to 2012, while the revisions for 200911 generally will consist of controlling to the new State totals described above.


On May 29, 2013, mostly minor corrections were made to January and February 2013 labor force and unemployment estimates for all substate areas in New Mexico.

On July 30, 2013, mostly minor corrections were made to labor force, employment, and unemployment estimates for selected substate areas in Arkansas, Illinois, Iowa, Kansas, Missouri, and Nebraska from January to April of 2013.

On August 28, 2013, mostly minor corrections were made to labor force, employment, and unemployment rate estimates for all substate areas in New Jersey and most substate areas in West Virginia from January to May of 2013. Selected interstate areas with several neighboring States were impacted as well. The corrections in New Jersey stemmed from an error in the employment estimation input for the Atlantic City-Hammonton, NJ Metropolitan Statistical Area, while the corrections in West Virginia stemmed from an error in the employment estimation input for Pocahontas County, WV. Also, the unemployment rate for Owls Head town, ME, was corrected from 7.2 percent to 7.3 percent for March 2013, due to a rounding error.


Last Modified Date: February 28, 2014