Source: Federal Reserve Bank of St. Louis  

Release: Selected Real Retail Sales Series

Units:  Millions of Dollars, Seasonally Adjusted

Frequency:  Monthly

Deflated Using the Consumer Price Index for All Urban Consumers (1982-84=100)

The U.S. Census Bureau maintained time series of monthly sales and end-of-month inventory estimates of retailers based on the Standard Industrial Classification (SIC) system. The SIC-based time series were discontinued as the North American Industry Classification System (NAICS) time series were newly introduced.
http://www2.census.gov/retail/releases/benchmark/annpub00.pdf