Context: St. John's, and the province as a whole, was gravely affected in the 1990s by the collapse of the Northern cod fishery, which had been the driving force of the provincial economy for hundreds of years. After a decade of high unemployment rates and depopulation, the city's proximity to the Hibernia, Terra Nova and White Rose oil fields has led to an economic boom that has spurred population growth and commercial development. As a result, the St. John's area now accounts for about half of the province's economic output.

Question: When did the Northern cod fishery collapse?
Answer: 1990s

Question: What led to an economic boom in St. John's?
Answer: Hibernia, Terra Nova and White Rose oil fields

Question: For how long did the Northern cod fishery provide a stable economy for St. John's?
Answer: hundreds of years

Question: How long did unemployment rates and depopulation suffer in St. John's?
Answer: decade

Question: What industry caused St. John's economy to boom in the 1990's?
Answer: Unanswerable

Question: What industry collapsed affecting the local economy for hundreds of years?
Answer: Unanswerable

Question: What has caused St. Johns to fall behind the rest of the province in economic output?
Answer: Unanswerable