White to Non-White Racial Dissimilarity (5-year estimate) Index for Grand Isle County, VT was 22.19% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Grand Isle County, VT reached a record high of 22.19 in January of 2022 and a record low of 1.86 in January of 2012. 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 Grand Isle County, VT - last updated from the United States Federal Reserve on May of 2024.