I referred to the Quebec Pension Plan and to the percentage of people receiving benefits from the Quebec Pension Plan and the Canada Pension Plan. You can find figures in publications, but they are not expressed in terms of a percentage of the population. That would be an interesting thing to do.
Moreover, we need numbers and amounts. That is how we see that women's contributions are less than those of men, because their salaries are lower than those of men. Equivalent statistics can be found for Old Age Security and the Guaranteed Income Supplement. Again, I found partial information in one publication. You have to look into data on revenue sources to find this information.