The amount of compressed natural gas (CNG) consumed as vehicle fuel had been relatively stable from month to month during 2006 to mid-2011 with a bit of volatility thrown in the summer and fall months. During August and September of 2011, CNG experienced a spike in consumption and then consumption skyrocketed in November and December. This increase in consumption was due to the drop in natural gas prices. Significantly lower natural gas prices continued into 2012 and 2013 and consumption continued to soar.

In 2013, annual CNG consumption for vehicle use was 451,999 gallons, which was 70 percent higher than consumption in 2011. In 2012, annual CNG consumption for vehicle use was 267,475 gallons, which more than tripled consumption in 2011. In 2011, annual CNG consumption for vehicle use was 85,611 gallons, which was 87 percent higher than consumption in 2010. In 2010, annual CNG consumption for vehicle use was 45,891 gallons, which was 10 percent lower than consumption in 2009. CNG consumption in 2009 was three percent higher than consumption in 2008. CNG consumption in 2008 was eight percent higher than consumption in 2007. CNG consumption in 2007 was 21 percent lower than consumption in 2006.