The 2015 E-Stats provides estimates of e-commerce activity in key sectors of the U.S. economy for 2015, revises previously released estimates for 2014 and earlier, and places these estimates in historical context. Underlying data are collected in four separate surveys of manufacturing, wholesale, service, and retail businesses. Corresponding data tables for each sector can be found at <www.census.gov/programs-surveys/e-stats/data/tables.html>.