Ask HN: Statistics on voting since hiding comment score?

I thought it would be interesting to know how/if hiding comment scores has affected participation on the site in the form of voting.

Since it is an easily quantifiable measure (compared to 'comment quality'), could anyone with easy access to the data dig up this information? I.e. total number of votes cast in, say a month, before hiding comment score vs. votes cast in the month after the change.