This graph reflects the number of single source contracts between suppliers' countries and recipient countries. Color indicates the number of single source contracts from Jan-May 2012. Green: 1, Blue 2, Yellow, 3-5, Orange: 6-10, Red: 11+.
Circles indicate that the supplier is from the recipient country. The width of the arrow indicates the relative total amount of money in those contracts (the max width of a line indicates $1 million USD, however some of those contract amounts are up to $40 million and are shown at the $1 million width for the purposes of this chart).
Source data: http://bit.ly/WBContracts