There were 2 factors affecting the birth rate in this period. First of all, American investment in Canadian industries boosted the Canadian economy, allowing families to have more children. Secondly, a trend over the same period toward larger families. As a result Canada's birthrate ballooned from the end of the Second World War until about 1965. As a whole, this caused a sudden population growth, as well as creating a swelling in the Canadian demographic curve. The aging of the population is projected to accelerate rapidly as more of the baby-boom generation turns 65 and as that happens, the number of senior citizens could exceed the number of children for the first time in Canada's history. Canada is facing unprecedented demographic change.
