Percentage of self-declared atheists in Europe, according to data collected by the Special Eurobarometer 493, 2019 (https://ec.europa.eu/commfrontoffice/publicopinion/index.cfm/ResultDoc/download/DocumentKy/88301).
This work is based on the empty map of Europe from https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe_(with_disputed_regions).svg .
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Strawhat42