Each of the last four years have started anywhere from 50 percent higher to nearly 3 times higher than the prior year. At the end of June, 2015, CNG consumption for vehicle use for the first six months of the year totaled 547,649 gallons, which was 56 percent higher than the amount of consumption in the first six months of 2014 (350,532 gallons). Consumption in 2014 climbed steadily higher through the year to a peak of 78,544 gallons in October. November's consumption dropped to 50,630 gallons, but bounced back in December to 70,774 gallons. At the year's end, CNG consumption for 2014 had jumped 67 percent higher than 2013's consumption.
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 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, 2013, 2014, and 2015 and consumption continued to soar. See Henry Hub data for spot price information.
In 2014, annual CNG consumption for vehicle use was 753,561 gallons, which was 67 percent higher than consumption in 2013. 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.
The number of vehicles consuming compressed natural gas can be found in the report The Number of Registered Vehicles in Nebraska by the Fuel Consumed.