Propane consumption for vehicle use for the first six months in 2018 started higher than last year, equivalent with the five–year (2013-2017) average, and in the upper boundary of the five–year (2013-2017) range. From February through May, consumption stayed above the five–year average but below last year's consumption. In June, consumption had a huge drop and although it stayed in the center of the five–year range, consumption was below the five–year average and last year's consumption. Consumption continued dropping in July but bounced back in August, peaking in October. The year ended below all three measures. This can be seen in Figure 1 below.
According to the data table below, propane consumption as vehicle fuel had been a bit bumpy from month to month during past years and annual totals had been declining. In the latter half of 2013, though, consumption skyrocketed in August and September. Consumption did drop in October and November but did not return to previous year levels. Each month's consumption for October, November, and December remained above 200,000 gallons. During the fall of 2013, Nebraska and surrounding states experienced late harvest at the same time. Shortly after harvest was completed, cold weather set in. These two back–to–back events occurring in the region, not just the state, increased propane demand and lowered propane supplies. Consumption in 2014 to 2016 were double the consumption of previous years. Annual consumption in 2017 and 2018 dropped 12 percent and 2 percent, respectively, from the prior year.
The number of vehicles consuming propane can be found in the report The Number of Registered Vehicles in Nebraska by the Fuel Consumed.