Since mid-September 2020, wholesale propane prices at Mont Belvieu, Texas, the main U.S. hydrocarbon gas liquids (HGL) hub, increased to an average of $1.33 per gallon (gal) during the week ending September 24, 2021, the highest weekly average since February 2014. Wholesale propane prices have increased because of high international demand and low global propane supply. The United States exported an average of 1.3 million barrels per day (b/d) of propane in the first half of 2021, 100,000 b/d more than in the first half of 2020, despite relatively flat production and domestic consumption.