Ford Motor Co reported a 6.8% fall in 2021 US vehicle sales on Wednesday, as the automaker struggled to deliver its cars and trucks due to lingering supply-chain bottlenecks and a global chip shortage.

The Detroit automaker sold 1,905,955 vehicles in 2021, ending up behind new US leader Toyota Motor Corp and rival General Motors Co. Ford had sold 2,044,744 vehicles a year earlier.

Ford's shares extended losses to trade down about 3% after the sales report.

Total US light vehicle sales for 2021 were just under 15 million, according to Wards Intelligence, below the five-year average of 17.3 million from 2015 to 2019.

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Sales of Ford's Mustang Mach-E electric crossover were 27,140 for 2021. The company plans to triple annual production of the electric crossover to more than 200,000 by 2023, to meet better-than-anticipated demand.

Ford has been focusing on its EV strategy and said on Tuesday it would nearly double annual production capacity for its red-hot F-150 Lightning electric pickup to 150,000 vehicles.

Shares of Ford gained about 136% in 2021, outperforming GM's 40.8% rise and EV leader Tesla Inc's 49.7% jump, as investors bet that buyers will lap up the electric version of the F-150.