That would be speculating. I think there is such a thing as voter fatigue, and it also depends when the election takes place. I'm a believer in fixed election dates, and that will certainly help people plan, and you now have that federally. That may help.
If you look at the municipal voter turnout, it is even lower than that 60%, so people tend to show up when they feel the issues are closer to them than for more larger questions.