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This French Revenue map shows the geographical distribution of high as well as depression earners inwards French Republic based on the country's taxation returns.
The map appears to exhibit a concentration of higher earners inwards the north-east, whilst lower earners seem to a greater extent than concentrated inwards the south-west. Zooming inwards on Paris the map too effectively visualizes the concentration of depression earners inwards the Saint-Denis northern suburb.
The information for the map comes from 2010 taxation returns.