OPEC said on Wednesday that Kazakhstan led a sizeable jump in February crude output by the wider OPEC+, highlighting a challenge for the producer group in enforcing adherence to agreed output targets.

The cartel still expects demand to grow by 1.45 million barrels a day this year and 1.43 million barrels a day the next, bolstered by strong air travel demand and road mobility.

The Organization of the Petroleum Exporting Countries (OPEC) on Wednesday affirmed its growth outlook for oil demand and overall economic expansion over the next two years.

Kazakhstan contributed more than a half of overall OPEC+ oil production rise in February, lagging behind its pledges to reduce production, OPEC data showed on Wednesday. Kazakhstan has persistently exceeded its output quota of 1.