Network hashrate history

Hey, everybody.
I am looking for a resource where I could get historical network hashrate for Zcash, and I can’t seem to find one.
I want to introduce some more insights in

If you are pushing your site to a ZEC forum, could you get ZEC appearing on the home page as one of the currencies? for example, replace “ETC”…

ZEC and other altcoins are available in But that’s not the question. The question is about historical hashrate. Do you know where I can get it?
You should be able to download and parse their data