sentences:  Plug-in models released to the retail customers in 2015 include the Mercedes-Benz C 350e Plug-in Hybrid, Volvo S60L PHEV, Volkswagen Passat GTE, BYD Tang, Audi A3 e-tron, Volvo XC90 T8, BMW X5 xDrive40e, and Hyundai Sonata PHEV.Almost 222,000 plug-in hybrids were registered worldwide in 2015. , the global stock of highway-capable plug-in hybrid electric cars totaled 517,100 units, out of total cumulative global sales of 1.257 million light-duty plug-in electric vehicles (41.1%).At the end of 2015, the United States is the world's largest plug-in hybrid car market with a stock of 193,770 units, followed by China with 86,580 vehicles, the Netherlands with 78,160, Japan with 55,470 units, and the UK with 28,250.