Alberta's GDP was between $60 billion and $80 billion annually during the years of the NEP (1980-1986). It is unclear whether the estimates took into account the decline in world crude oil prices that began only a few months after the NEP had come into force, the graph of long-term oil prices shows that prices adjusted for inflation did not drop below pre-1980s levels until 1985. Since the program was cancelled in 1986, the NEP was active for five years with among the most expensive for oil prices on record, and the NEP prevented Alberta's economy from fully realising those prices.
