Just to say: people have known this for absolutely years and OPEC nations have been lying about production/reserves/everything since the cartel was formed. And

Just to say: people have known this for absolutely years and OPEC nations have been lying about production/reserves/everything since the cartel was formed. And yes, it is unsourced...because the point is very much that OPEC is using this data to determine things like production share, so there is a massive incentive to fabricate data which no-one can prove.