Additionally, the new low emissions package makes the 2012 Volt eligible for owners to receive up to in state rebates through the state's Clean Vehicle Rebate Project (CVRP). This incentive is in addition to the federal government's tax credit. Only the 2012 Volts manufactured after February 6, 2012, are fitted with the low emission package and sold as standard models in California. Other states where the Volt has solo driving access to HOV lanes are Florida, Georgia, New York and Virginia. When introduced in December 2010, the 2011 Volt was the most fuel efficient car sold in the American market in the compact class, with a combined gasoline-electricity fuel economy of equivalent (MPG-e), until it was surpassed by the 2012 Ford Focus Electric in February 2012. Nevertheless, the Volt remained as the most fuel efficient car with an internal combustion engine available in the United States until May 2014, when the BMW i3 REx replaced the Volt as the most efficient EPA-certified current year vehicle with a gasoline engine, with a combined gasoline-electricity fuel economy of equivalent (MPG-e). In December 2012 General Motors reported, based on data collected through its OnStar telematics system since Volt deliveries began, that Volt owners drive around , or a month and a half, between fill-ups. By mid June 2014, GM reported that among Volt owners who charge regularly, they typically drive more than between fill-ups and visit the gasoline station less than once a month. In early October 2014, based on General Motors' real time tally of miles driven by Volt owners in North America, the company reported they have accumulated a total of 1 billion miles (1.6 billion km) traveled, of which, about 62.5% were driven in all-electric mode. A similar report, issued by GM in August 2016, reported that Volt owners have accumulated almost 1.5 billion miles (2.4 billion km) driven in EV mode, representing 60% of their total miles traveled. The 2015 edition of the EPA's annual report "Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends" estimates the following utility factors for 2015 model year plug-in hybrids to represent the percentage of miles that will be driven using electricity by an average driver, whether in electric only or blended modes, The Volt has a utility factor of 66%, compared with 83% for the BMW i3 REx, 45% for the Ford Energi models, 43% for the McLaren P1, 37% for