"This interactive website includes the entire US census history from 1790 to 2010, the American Community Survey (ACS) from 2005 to 2012, the Religious Congregations and Membership Study (RCMS) from 1980 to 2010 (the most complete census available on religion in the US), InfoGroup data on religious congregations in the US for 2009 and 2010, and carbon emissions data for 2002 from the Vulcan Project. Overall, the site contains 39 billion data points, 200,000 variables, and 15,000 interactive maps."