OPEC forecast on Monday that oil supply from non-member countries will post a larger-than-expected decline this year due to the collapse in prices, boosting the need for crude from the producer group. Supply outside the Organization of the Petroleum Exporting Countries (OPEC) would decline by 660,000 barrels per day (bpd) in 2016, led by the United States, OPEC said in a report. Last month, OPEC predicted a drop of 380,000 bpd.