OTTAWA — Canada’s population of those 85 and older is expected to triple by 2073 to as many as 4.3 million people, an increase that will likely place new pressure on the country on several fronts, one demographer says.

Statistics Canada said in its projections released Monday that the country’s population could reach a medium-growth forecast of 63 million by 2073 and at least 3.3 million will be over 85.