Chevy Volt is plug-in bestseller.

A total of 98,558 Chevrolet Volt have been sold in the U.S. through June 30th. Sales will likely surpass 100,000 units by the end of this month, making the Volt the best-sold plug-in vehicle in the country. With 95,384 sales, Nissan Leaf trails just behind the Chevy.
insideevs.com