A very large number of curves in this graph – select individual curves on the right hand menu. The dependency ratio going out to the year 2100 is affected by two variables here. One is the fertility rate and the other is the rate of immigration. The outputs are displayed in three different breakdowns of the dependency ratio. The dependent young what are 15 and under. The dependent old who are 65 and older and the total of the two.
Dependency ratio: This is the number of people in two groups – those over 65 and those under 15 – divided by the number of those between the ages of 15 and 65.
Fertility: Total number of children per woman. 2.1 is replacement level and Canada’s current level is approximately 1.6
Immigration: Annual net immigration as a percentage of the population. Currently in Canada, immigration is running at the 0.8% to 1.0% level.