I would say to keep the data apples and apples you should merely omit it with a note: no vote totals released.
It is the contention of the Sanders camp that he got far more votes, and he has some good talking points for that argument.
I only found one site that gave something other than “et.” so I went with that on the IA Dem vote. I figured those were probably individual precincts or voting delegates or something.
If I could find an actual vote count...I would list it and change those charts and the underlying data.
Let me know if you find such a sit.
Also, I do not always list every singe state/territory voting on the dates...just the most consequential.