Beginning 2 years after establishment of the Council and annually thereafter, the Secretary of Commerce, using the refiner price to end users of consumer grade propane, as published by the Energy Information Administration and other public sources, shall prepare and make available to the Council, the Secretary of Energy, and the public an analysis of changes in the price of propane relative to other energy sources. The propane price analysis shall compare indexed changes in the price of consumer grade propane to a composite of indexed changes in the price of residential electricity, residential natural gas, and refiner price to end users of No. 2 fuel oil on an annual national average basis. For purposes of indexing changes in consumer grade propane, residential electricity, residential natural gas, and end user No. 2 fuel oil prices, the Secretary of Commerce shall use a 5-year rolling average price beginning with the year 4 years prior to the establishment of the Council.