Social Explorer Social Explorer provides access to current and historical census data and demographic information and lets users create maps and reports to illustrate, analyze, and understand demography and social change. Among other documents Social Explorer includes the entire US Census from 1790 to 2010, annual updates from the American Community Survey, the Religious Congregations and Membership Study (RCMS) from 1980 to 2010 and Carbon Emissions Data for 2002 from the Vulcan Project.