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 Size Class a (over 1,500,000 persons) [CUURA000SAEC], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CUURA000SAEC, December 10, 2016.