Worldwide Sales of natural gas vehicles are expected to grow rapidly over the next five years, to 3.2 million units annually by 2016 from 1.9 million in 2010, according to a recent report from Pike Research. Three-quarters of the new growth between 2010 and 2016 will come in corporate and government sales. 

There are currently about 12.6 million natural gas vehicles in use worldwide, and sales of natural gas vehicles (NGV) vary widley from region to region and country to country. In North America, due largely to a lack of convenient refueling stations, demand for NGVs is largely related to the fleet market.