White to Non-White Racial Dissimilarity (5-year estimate) Index for Rio Arriba County, NM was 28.37% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Rio Arriba County, NM reached a record high of 36.00 in January of 2011 and a record low of 16.88 in January of 2016. 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 Rio Arriba County, NM - last updated from the United States Federal Reserve on May of 2024.