Lazaro Gamio and Josh Holder for the New York Times break down energy imports by country and the percentage that comes from the Middle East.
It seems likely that these percentages will swing one way or another in the near future, but variable width bar charts are my statistical chart weakness. Total energy, in dollars, is on the y-axis, and the share of that from the Middle East, by percentage, is on the x-axis. There are a set of four charts for Asia, Europe, Africa, and the Americas, with consistent scales across the set.
Visualize This: The FlowingData Guide to Design, Visualization, and Statistics (2nd Edition)
