A political scientist probably studies this somewhere in Canada.
My experience, and what I can recall, is that there aren't that many national level governments around the world that do it, but there have been occasions where, as I said, they've lowered it. Most recently, I cited the example of the Scottish national referendum on Scottish independence, as well as what's happening in P.E.I., where there's an important kind of question that's going to shape the future of a country or jurisdiction and it's important to have young people engaged.
I think, though, as said, that the 16-year-olds and 17-year-olds have shown up and wanted to have their voice heard. I think it opens the door to conversation that maybe they should be given a full say in other realms as well at election time.