 Over the first 24 months from introduction, the Prius HEV achieved monthly sales of over 1,700 in month 18, the Leaf achieved about 1,700 units in month 7, the Prius PHEV achieved nearly 1,900 sales in month 8, and the Volt achieved more than 2,900 sales in month 23.A 2016 analysis by the Consumer Federation of America (CFA) found that 5 years after its introduction, sales of plug-in electric cars in the U.S. continued to outsell conventional hybrids.The analysis considered sales between January 2011 and December 2015.