I'd argue registered voter turnout also isn't a true turnout statistic, as many people will not be registered due to apathy/feeling it doesn't matter/etc. The

I'd argue registered voter turnout also isn't a true turnout statistic, as many people will not be registered due to apathy/feeling it doesn't matter/etc. The statistic you really want is votes / eligible voters, not registered voters. But that's a hard number to figure out in the US.