Nationwide cost per gallon drops for seventh straight week.
Slight nationwide uptick in usage could spell reverse to downward price trend.
Federal Reserve voted to raise interest rates on Wednesday.
Gainesville area, Florida sees 17-cent drop since last week.
Cost per barrel of oil, nationwide demand decreases.
Chick-fil-A releases Jackson, Tenn. takes top spot.
Federal Reserve expected to raise key short-term interest rates again.
Airport works through $75 million improvement plan.
Gas declines for fourth straight week despite slight increase in demand.
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