GASOLINE and DIESEL FUEL
What is the Consumer Price Index (CPI)?
"The Consumer Price Index (CPI) is a measure of the average change over time in the prices paid by urban consumers for a representative basket of consumer goods and services" with respect to a given base year with value 100. Source: Bureau of Labor Statistics
What is inflation?
As measured with CPI, it is the percent change in the CPI between two different years, showing the "annual percentage change in the cost to the average consumer of acquiring a basket of goods and services". Source: Federal Reserve Bank of St. Louis
CPI Inflation Formula: CPIx-1-CPIx ⁄CPIx*100
In the United States...