Here's the current Natural Gas Forward Curve until May 2013. The current forward curve implies for the coming year a rolling return of -22.12%. For the running time of 2 or 3 years is a rolling return of -26.88% and -30.15% to be seen. Here can be seen that the curve for next year significantly steeper compared with the next 2 years.
The months of February, March, April and May of the next 3 years implies the current forward curve as required to be considered backwardation situation.