White to Non-White Racial Dissimilarity (5-year estimate) Index for Rockingham County, NH was 32.22% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Rockingham County, NH reached a record high of 34.09 in January of 2013 and a record low of 26.57 in January of 2017. 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 Rockingham County, NH - last updated from the United States Federal Reserve on May of 2024.