Click on this link:
https://uselectionatlas.org/RESULTS/data.php?year=2016&datatype=national&def=vto&f=1&off=0&elect=0At the bottom of the table, click on the boxes
Total Ballots Cast
Total Invalid Ballots (Under/Over-Votes)
Percent Invalid Ballots (Under/Over-Votes)
and click "submit".
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Dave has not fully updated these numbers for the states yet, for example NC and KY are missing.
Some states are not publishing "total ballots cast" at all.
But there are certainly at least 1.5 million ballots that were cast downballot other than for President, if not wayyyy more ...
That means total turnout was around 139 million, or even higher ...