sentences:  Between 2003 and 2010 most PHEVs on the roads were conversions of production hybrid electric vehicles, and the most prominent PHEVs were aftermarket conversions of 2004 or later Toyota Prius, which have had plug-in charging and more lead-acid batteries added and their electric-only range extended., over 25 models of highway-capable plug-in hybrids have been launched in several markets since December 2008, including the BYD F3DM (out of production), the Chevrolet Volt and its siblings Opel/Vauxhall Ampera and Holden Volt, Prius Plug-in Hybrid (out of production), Fisker Karma (out of production), Ford C-Max Energi, Volvo V60 Plug-in Hybrid, Honda Accord Plug-in Hybrid (out of production), Mitsubishi Outlander P-HEV, Ford Fusion Energi, McLaren P1 (limited production), Porsche Panamera S E-Hybrid, Cadillac ELR, BYD Qin, Volkswagen XL1 (limited production), BMW i8, Porsche Cayenne S E-Hybrid, Volkswagen Golf GTE, Audi A3 e-tron, Porsche 918 Spyder (limited edition), Mercedes-Benz S 500 Plug-in Hybrid, SAIC Roewe 550 PHEV, Mercedes-Benz C 350e Plug-in Hybrid, Volvo S60L PHEV, BYD Tang, Volkswagen Passat GTE, Volvo XC90 T8, BMW X5 xDrive40e and Hyundai Sonata PHEV.Global sales of plug-in hybrids grew from over 300 units in 2010 to almost 9,000 in 2011, jumped to over 60,000 in 2012, and reached almost 222,000 in 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. , about 640,000 highway legal plug-in hybrid electric cars have been sold worldwide since December 2008, out of total global sales of over 1.5 million light-duty plug-in electric cars.