G17: Seasonal Factors for domestic auto and truck production have been revised

Seasonal factors for auto and truck production were revised from January 2016 through June 2022 on April 15, 2021. The revised factors for October 2020 through March 2021 were used in the G.17 release issued on April 15, 2021, and the revised factors for earlier months will be incorporated into the production estimates at the time of the annual revision in the spring of 2021. The revised seasonal factors are based on production data through January 2021; in the estimation, production data for March through May 2020 are identified as outliers due to the pandemic recession. The seasonal factors are scheduled to be revised again in March 2022.