OPEC

The Organization of Petroleum Exporting Countries increased oil output by 1.5 percent in May, the biggest gain since 2007, a Bloomberg News survey showed.

Oil output averaged 28.15 million barrels a day last month, up 405,000 from April, according to the survey of oil companies, producers and analysts. The 11 OPEC members with quotas, all except Iraq, pumped 25.76 million barrels a day, 915,000 more than their target.
Bloomberg