Using World Bank GDP data and BP primary energy consumption statistics, this chart shows the energy efficiency of select countries, in terms of GDP produced for each barrel of oil equivalent consumed. Among all Gulf countries, Iran performs the worst on this metric, largely a result of inefficient industries, partly a result of the sanctions regime, and heavy subsidization of energy consumption up to 2010 and the slow phase out of subsidies until 2015. In contrast, the low energy consumption, relative to GDP, of the US, Germany, and Norway portray lowering energy intensity as economies shift towards service industries.