The price of natural gas has changed significantly over the last forty years reflecting its volatility or instability. The average annual prices for the residential, commercial, and industrial sectors mimicked each other's movements and kept a steady price spread. From 2010 to 2011, the price of natural gas in the electric power sector decreased $1.37 or 20 percent, the commercial sector price decreased 41 cents or 6 percent, the industrial sector price decreased 28 cents or 5 percent, and the residential sector decreased 17 cents or 2 percent.
In 2011, the residential sector paid the highest price out of all the sectors at $8.51 per billion cubic feet. The commercial sector's price was the next highest at $6.45, the electric power sector's price was $5.56, and the industrial sector's price was $5.40 per billion cubic feet.
The prices are in nominal dollars to provide a better comparison.