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The figures are the sources' own (named in each column); aggregates for a county, not an appraisal of any parcel.","doi":null,"page_url":"https://groundworkmap.com/data/illinois-growth","csv_url":"https://groundworkmap.com/data/illinois-growth.csv","method":"Figures copied from the agencies' public files as published; per-1,000 and percent changes are computed here from those figures and rounded to one decimal. A blank cell: the agency publishes no figure for the county (no permit office reporting to the Census, a BLS disclosure suppression, an ACS estimate above a 30% coefficient of variation, or no FHFA county index). 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