Thank you for your question. I think it's an interesting question, and I actually asked the same question myself in preparing for coming to this committee.
We don't really have a thorough answer, but if you look at the Statistics Canada studies, you'll see that women tend to live longer than men, and in my speech I did mention that women generally vote at higher rates until they reach the age of 65. Then, between 65 and 75, they tend to be at parity, and then when they're 75 and older, they tend to vote at a lower rate.
The hypothesis would be that as we age, we face mobility disabilities and so forth, so there may be an issue in getting to the voting booth for women as they age, as they live longer. That's really the only explanation we have at this point.