Voter Participation

We frequently hear about the lack of voter participation. There are of course several reasons for this which I won't get into right now. But just to give you an idea of what voter participation used to be like, the 1914 elections in Washington (offyear elections) witnessed 94.6% turnout of registered voters. This was exceptional even for the time because women had just got the right to vote in WA and because of massive organizing around temperance issues. Nonetheless, what would it take for this to happen today?