Prior to release of the 2018 data products, the Census Bureau identified an error in the data for Gratiot County, MI, which impacted 2018 ACS 1-year Supplemental Estimates in Gratiot County.  The error occurred during personal interview data collection which resulted in an unreasonable estimate for the housing vacancy rate. The 2018 1-year Supplemental Estimates for housing occupancy status, table K202501, have been suppressed for the affected geographies.