Expenditures on petroleum increased to $5,704.4 million ($5.7 billion) in 2021, which was a 43.5–percent increase from 2020 expenditures of $3,974.3 million ($4.0 billion).
The transportation sector spent over three–quarters (83 percent) of the total expenditures. The industrial sector spent 13 percent, the residential sector spent 2.2 percent, and the commercial sector spent 1.7 percent, while the electric power sector spent less than 1 percent (0.23%).
The expenditures are in nominal dollars to provide a better comparison.