owid

{
    "link": "https://www.census.gov/data.html and https://nces.ed.gov/datatools/",
    "retrievedDate": "30/09/2017",
    "additionalInfo": null,
    "dataPublishedBy": "US Bureau of the Census and NCES (2017)",
    "dataPublisherSource": "US Census Bureau and NCES\nRevenue Data:\n(a) Historical Statistics of the United States Colonial Times to 1970 (1890-1970)\n\n(b) NCES Digest of Education Statistics 2015 (1970-2010)\nGDP Data:\n\n(c) Historical Statistics of the United States Colonial Times to 1970 (1890-1930)\n\n(d) US Census Bureau. Statistical Abstract of the United States: 2012 (1930-2010)"
}