Cartogram

Net contributors      -5000 to -1000 euro per capita      -1000 to -500 euro per capita      -500 to 0 euro per capita
Net recipients
     0 to 500 euro per capita      500 to 1000 euro per capita      1000 to 5000 euro per capita      5000 to 10000 euro per capita      10000 euro plus per capita      n/a

Source

Cartograms distort they actual land and distance shown in order to convey the information. Above is an example of a catrogram map which is being used to predict the European Union's net budget expenditure in euros for the whole period 2007-2013 per capita. The colors and distortion of the map remind me of a cardiogram for your heart.