Yes. My tendency is to start at 65 because we have a lot of federal programs and provincial programs that look at 65 as the age when one turns senior, so that would be a starting point. Then, as a few of us have already said, you may want to look at other factors and other ages after that.
I think 65 is still applied as a standard. If we look historically, the age of 65 was set out because at that time it wasn't felt that people would live much longer than 65.