answers: Saudi Arabia
context: with the United States planning a response to the Douma chemical attack in the Syrian Civil War, WTI ended the day at $66.82, with Brent at $72.04, both the highest since December 2014. WTI fell from $69.56 and Brent from $74.74, both the highest since November 2014, on a week when U.S. inventories were lower and gasoline demand was higher. WTI ended May 18 down slightly at $71.28 but still higher for the third week after reaching its highest level in three and half years twice. Brent rose for the sixth week in a row, the most since 2011, finishing </s> parameters, number of vehicles in the world competing for fuel, quantity of oil exported to the world market (Export Land Model), net energy gain (economically useful energy provided minus energy consumed), political stability of oil exporting nations and ability to defend oil supply lines.ci The top three oil producing countries are Russia, Saudi Arabia and the United States. In 2018, due in part to developments in hydraulic fracturing and horizonal drilling, the United States became the world's largest producer. About 80 percent of the world's readily accessible reserves are located in the Middle East, with 62.5 percent coming from the </s> since June 2015 before falling back to $59.69, while Brent crude passed $67 for the first time since May 2015 before falling to $66.50. Pipeline problems in Libya and the North Sea added to production cuts by OPEC and Russia. Both WTI and Brent crude began the year above $60 for the first time since 2014. Later in the week WTI reached $62.21 and Brent crude $68.27, both the highest since May 2015. Protests in Iran added to other factors that were keeping prices high. With U.S. inventories the lowest in three years, and cold weather decreasing U.S. production, oil
question: who sells the most oil in the world