In Figure 1, diesel fuel's monthly consumption in 2019 was down in February although barely below last year's consumption, in the upper boundary of the five–year range, and still above the five–year average. From March to May, consumption increased. In April and May, consumption was above last year's consumption, above the five–year average, and above the five–year range. From June to September, consumption was stable sitting in or above the upper boundary of the five–year range and far above the five–year average. Demand and consumption spiked in October. In November and December, demand and consumption slowed but remained above or in the upper boundary of the five–year range, above last year's consumption in November and December, and above the five–year average.
As for annual consumption, it can be seen in Figure 2 that diesel fuel consumption continues to increase. Also seen in Figure 2, consumption in the last three years has increased each year bringing consumption out of the plateau seen from 2010 to 2015.
An indicator to support high or low consumption of diesel fuel is reported in miles traveled. From month to month, the difference in miles traveled can be large. From year to year, the number of miles traveled indicate very little difference although there are small increases that add up when looking at the miles traveled ten years and twenty years ago. A drawback to the miles–traveled data is that the data for passenger cars, recreational vehicles, and diesel trucks are not separated.