A new study by the U.S. Energy Information Administration (EIA) finds electric car sales in 2018 were more than five times higher than those in 2016, with nearly all the gains coming from the Hyundai kona.
The Kona sold nearly 10,000 electric vehicles in the U, compared with just over 7,000 in 2016.
It also beat all of the other electric vehicles sold last year.
The U.K.-based Kia and the German-owned Mercedes-Benz are among the big names, but other models from other automakers are also gaining in popularity, including the Ford Fusion and the Honda Fit.
The study, which was conducted for the EIA by market research firm IHS Automotive, found that there were 6.9 million electric cars sold in the United States in 2018, compared to 6.4 million in 2016 and 6.3 million in 2015.
Sales were up almost 20 percent over last year, and the overall market for electric vehicles rose to almost 790,000 vehicles.
According to the report, electric car purchases rose from 9,000 units in 2014 to 10,500 units in 2018.
That’s up from just over 8,500 in 2016 but just a third of the gains in sales from 2015.
The total number of electric vehicles and the number of new electric cars were not reported, so the figures are likely to be lower than in previous years.
The study found the electric car market was expected to reach about 1.1 million units in 2020, up from 1.0 million units a year earlier.
EIA forecasts electric car penetration will continue to increase in 2020.
In 2019, more than 1 in 3 electric cars in the country will be electric, the agency said in a statement.
In 2018, the total number-of-vehicle sales for electric cars was down from 2.7 million in 2017, and electric vehicle sales were down by almost two-thirds from 2015, the report found.
More:EIA data: Electric car sales for 2020