California had 8.64 plug-in vehicle (PEV) registrations per 1,000 people in 2017, followed by Hawaii with 5.12, and Washington state with 4.06, according to the US Department of Energy data.
Other states with PEV registrations per 1,000 people greater than two were Oregon, Vermont, Colorado, Arizona, and Maryland.
Seventeen states plus the District of Columbia were between one and two PEV registrations per 1,000 people, while 25 states were below one. The average for the United States is 2.21 PEV registrations per 1,000 people.
More than 500,000 electric vehicles have been sold in California, with sales topping that figure in November 2018, according to tracking by Veloz, a public-private coalition of major electric car industry stakeholders.
Cumulative sales of electric vehicles in California totaled 512,717 in November, up 30 percent from the month before and 164 percent from a year earlier. Plug-in vehicles accounted for 7.1 percent of California car sales in the first three quarters of the year with all-electric vehicle sales outpacing plug-in hybrid sales 4.1 percent to 3 percent, respectively.
As of October 2018, more than one million plug-in vehicles have been sold in the United States.
