Back in the 1960s, the Ontario government's Department of Economics dutifully cranked out annual population forecasts. What is remarkable about these forecasts is how far wrong they were. The economists completely failed to predict the demographic changes that were about to hit Ontario.
Here are the 1961 projections side by side with the actual 1976 population numbers for Ontario, downloaded from Statistics Canada's CANSIM table 051-0001. (An image taken from the Ontario Economic Survey can be found at the end of the post):