The figure for April was 344,000 bpd less than that of March.
The U.S. government has blamed the rising crude prices to be the main reason for the decline in pumping in April. However, many believe that fundamental supply and demand as a factor in the recent has increased.
Besides, soaring energy prices were supported by depreciation in the U.S. dollar, rising demand and disruptions from the conflict-affected regions like in Libya.
On the other hand, Iraq, although an OPEC member, doesn't participate in OPEC quota agreements.