This seems like a good statistic to have: it shows how much someone does several important moderation duties.
Also, the elections page shows how many flags that user made, but that's not the whole story.
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It would be good information to have.
However, it's not currently public information (you can see close voter names after a question has been closed, but the actual votes are private). Also, so far as I can tell we've only tracked this information for a bit less than a year (prior to that, close votes were hard deleted) so the most useful statistic (success rate for close/re-open) could only be accurate for the past 10 months.
I don't think we can in good conscience reveal raw vote numbers, but if individual nominees want to post this, they're free to do so.