Source: US. Bureau of Labor Statistics
Release: Consumer Price Index
US. Bureau of Labor Statistics, Consumer Price Index for All Urban Consumers: Education and communication commodities in Northeast urban - Size Class A (over 1,500,000 persons) [CUUSA100SAEC], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/CUUSA100SAEC/, August 4, 2015.