Downward forces on oil and gas countered higher prices for shelter and food.
Consultancy is forecasting oil to remain below $50 a barrel through 2017.
Forecast predicts 25% drop in energy exports and a 23% drop in natural gas exports this year.
Average realized price for upstream production drops to $40.84 a barrel from $72.21 last year.
Weaker military and oil sector demand to blame.
Volatile oil and gas prices will force province to hold the line on spending, finance minister Horner says.