Important Information

Annual Revisions

Each year, historical estimates from the Local Area Unemployment Statistics (LAUS) program are revised to reflect new population controls from the Census Bureau, updated input data, and reestimation. The data for model-based areas also incorporate new seasonal adjustment, and the unadjusted estimates are controlled to new census division and U.S. totals. Substate area data subsequently are revised to incorporate updated inputs, reestimation, and controlling to new statewide totals.

Model-Based Areas

On February 28, 2017, the LAUS program issued 2016 annual-average civilian labor force and unemployment 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-Naperville-Arlington Heights, IL Metropolitan Division; the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area; New York city, NY; the Cleveland-Elyria, 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 for these areas were revised from January 2012 forward. The updated population controls reflect recent U.S. Census Bureau revisions from April 2010 forward.

Statewide data for Puerto Rico (which are not model-based, but rather are tabulated from a household survey similar to the Current Population Survey for the U.S.) similarly were revised from January 2012 forward. The not-seasonally-adjusted data reflect the incorporation of new population controls, while the SSA data reflect seasonal adjustment and smoothing of the recontrolled not-seasonally-adjusted data.

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 2016 also were replaced.

Substate Areas

On April 21, 2017, routine revisions will be made to data from 2012 through 2016 for geographic areas below the state level (other than the model-based areas noted above), and official annual averages for 2016 will be issued. For substate areas, estimation inputs will be revised back to 2015, while the revisions for 201214 generally will consist of controlling to the new state totals described above. However, some states will have revisions as far back as January 2010.


On April 27, 2016, corrections were issued for substate areas in Kentucky, as well as eight interstate areas with parts in Kentucky, for January 2016. The establishment-based non-agricultural wage and salary employment inputs to household employment were found to have been over-estimated in the following four counties: Fulton, Harlan, Russell, and Union. Through additivity, employment in all other counties in the State was impacted, but the corrections outside of those four counties were relatively small. While unemployment rates were revised upward by between 0.3 and 0.7 percentage point across the four counties directly impacted by the employment input corrections, rates changed by no more than 0.1 point in the remaining areas affected through additivity, and most had no rate change.

On June 1, 2016, corrections were issued for all cities and city parts in Minnesota for January and February 2016. The errors had resulted from incorrect processing of unemployment insurance claims inputs. Unemployment levels were revised downward by as much as one-third, and associated unemployment rates were revised downward by as much as 2.2 percentage points. The average unemployment level decline was 7.4 percent, and most of the unemployment rate declines were less than 0.5 percentage point.

On November 2, 2016, corrections were issued for substate areas in Wisconsin in July 1998 and substate areas in Montana in all months of 1999. Interstate areas with parts in Wisconsin also were impacted in July 1998. The employment and unemployment level estimates for these area-months had not reflected the appropriate state controls due to past processing errors. The corrections process consisted of simple ratio adjustment to the current state model-based controls. Unemployment rates were mostly unchanged, differing by a maximum of 0.5 percentage point in just one instance.


Last Modified Date: February 28, 2017