Roper iPoll*"The Center’s mission is to collect, preserve, and disseminate public opinion data; to serve as a resource to help improve the practice of survey research; and to broaden the understanding of public opinion through the use of survey data in the United States and around the world."
"The Roper Center for Public Opinion Research, located at Cornell University, is the world’s leading archive of public opinion survey data. Founded in 1947, the Roper Center holds data ranging from the 1930s, when survey research was in its infancy, to the present. The archive collection now includes hundreds of thousands of questions and tens of thousands of individual-level datasets, with hundreds more added each year."