AP -- A person familiar with the vaccination rates says two NFL teams remain under 50% vaccinated less than two weeks from the start of training camp. Washington and Indianapolis had the four lowest COVID-19 vaccination rates in the league as of Friday, according to the person who spoke to The Associated Press on condition of anonymity because the league hasn't released the numbers.

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Pittsburgh, Miami, Carolina and Denver have the highest vaccination rates and are among 10 teams that have achieved at least 85%. About 73% of players have been vaccinated. Teams on the lower end of the vaccination table face potential competitive disadvantages. The person says the NFL doesn't plan to cancel any games this season.

LOOK: See how much gasoline cost the year you started driving

To find out more about how has the price of gas changed throughout the years, Stacker ran the numbers on the cost of a gallon of gasoline for each of the last 84 years. Using data from the Bureau of Labor Statistics (released in April 2020), we analyzed the average price for a gallon of unleaded regular gasoline from 1976 to 2020 along with the Consumer Price Index (CPI) for unleaded regular gasoline from 1937 to 1976, including the absolute and inflation-adjusted prices for each year.

Read on to explore the cost of gas over time and rediscover just how much a gallon was when you first started driving.