Mass market plug-in vehicle sales began in the United States at the end of 2010 with just a few models available to consumers. As new plug-in models have been introduced and production volumes have increased, sales have accelerated accordingly. It took nearly eight years to reach one million cumulative sales but just two and a half more years to reach two million cumulative sales. Just 10 months after reaching two million in June 2021, cumulative sales climbed to 2.6 million as of April 2022.

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