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A Model S electric vehicle (EV) with a personalized license plate charges at a supercharger station at the Tesla Motors Inc. Gallery and Service Center in Paramus, New Jersey, U.S., on Thursday, Dec. 11, 2014. Tesla rose 1.2 percent at the end of trading mid last week to close at $216.89 after falling as low as $204.27. For the year, the shares have gained 44 percent. Photographer: Ron Antonelli/Bloomberg via Getty Images

A Model S electric vehicle (EV) with a personalized license plate charges at a supercharger station at the Tesla Motors Inc. Gallery and Service Center in Paramus, New Jersey, U.S., on Thursday, Dec. 11, 2014. Tesla rose 1.2 percent at the end of trading mid last week to close at $216.89 after falling as low as $204.27. For the year, the shares have gained 44 percent. Photographer: Ron Antonelli/Bloomberg via Getty Images