Ask the question: What organization or agency would likely collect this data?
Government Agencies? Government Agencies collect data at all levels to aid policy decisions. It is generally distributed free via the internet. Organizations ? Larger data sets are generally available in SPSS, Excel, SAS or Stata formats.
Repository of over 35 billion datapoints from over 450 databases sourced from 70 public and private organizations. Searchable by keyword, subject and source. The datasets permit correlation of multiple, diverse indicators, with tools to interpret and visualize the data. Data available from 1948 - present.
Polling data ranging from the 1930s - present. Almost 700,000 questions of U.S. samples can be searched at the question-level in iPOLL, while RoperExpress lets you download of over 23,000 datasets from over 100 countries.