What country is the largest exporter of gasoline into US?

What country is the largest exporter of gasoline into US?
"Net petroleum imports (imports minus exports) accounted for 58 percent of our total petroleum consumption. About 48 percent of our net petroleum imports were from countries in the Western Hemisphere, 22 percent from Africa, 18 percent from the Persian Gulf , and 12 percent from other regions."

http://www.eia.doe.gov/bookshelf/brochures/gasoline/index.html