The reduction coincided with US sanctions against Iran's nuclear programme that targeted foreign suppliers of gasoline and blocked access of banks doing business with Iran to the US financial system.
Reducerea a coincis cu sancţiunile impuse de SUA împotriva programului nuclear al Iranului, sancţiuni care au vizat furnizorii străini de benzină şi au blocat accesul băncilor care făceau afaceri cu Iranul la sistemul financiar american.