 With an estimated 9,500 units delivered worldwide during the fourth quarter of 2016, global sales in 2016 totaled 25,312 Model X cars, allowing the Model X to rank seventh among the world's top ten best-selling plug-in cars just in its first full year in the market., cumulative sales totaled 25,524 units since its inception.The United States is its main country market with 18,240 units delivered through December 2016, of which, an estimated 18,028 Model X vehicles were delivered during 2016, making the electric SUV the third best-selling plug-in electric in the American market that year after the Tesla Model S and the Chevrolet Volt.