White to Non-White Racial Dissimilarity (5-year estimate) Index for Gratiot County, MI was 41.15% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Gratiot County, MI reached a record high of 43.65 in January of 2016 and a record low of 30.10 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for White to Non-White Racial Dissimilarity (5-year estimate) Index for Gratiot County, MI - last updated from the United States Federal Reserve on May of 2024.