Oil costs slid on Friday yet were set to post their greatest annual gains in 12 years, prodded by the global economic recovery from the COVID-19 droop and maker restriction, even as contaminations flooded to record highs around the world.

Brent crude futures fell 3 cents to $79.50 a barrel at 0718 GMT, while U.S. West Texas Intermediate (WTI) crude fates dropped a dime, or 0.1%, to $76.89 a barrel.

Brent is on target to end the year up 53%, while WTI is setting out toward a 57% increase, the strongest performance for the two benchmark contracts beginning around 2009, when costs took off over 70%. The two agreements contacted their 2021 peak in October with Brent at $86.70 a barrel, the highest starting around 2018, and WTI at $85.41 a barrel, the loftiest starting around 2014.

Global oil costs are relied upon to rise further one year from now as jet fuel demand catches up.

“We’ve had Delta and Omicron and all manner of lockdowns and travel restrictions, but demand for oil has remained relatively firm. You can attribute that to the effects of stimulus supporting demand and restrictions on supply,” said Australian brokerage firm CommSec’s Chief Economist Craig James.

Nonetheless, in the wake of ascending for a few straight days, oil costs slowed down on Friday as COVID-19 cases took off to new pandemic highs across the globe, from Australia to the United States, stirred up by the highly transmissible Omicron Covid variant.

U.S. health specialists cautioned Americans to get ready for serious disturbances in coming weeks, with infection rates liable to deteriorate in the midst of expanded holiday travel, New Year celebrations and school reopenings following winter breaks.

With oil drifting close $80, the Organization of the Petroleum Exporting Countries, Russia and partners, together called OPEC+, will presumably stick to their plan to add 400,000 barrels each day of supply in February when they meet on Jan. 4, four sources said, as they keep on twisting back sharp production cuts implemented in 2020.

“I think we will see a lot of pressure on OPEC+ to make sure there’s enough oil being supplied to market,” James said.