Serious Question: How well known is El Santo outside Mexico?

In my home country of Mexico El Santo is a cultural icon. I recently saw a WhatCulture video where they mentioned him and it made me wonder how familiar wrestling fans worldwide are with him. El Santo is the first wrestler I knew about growing up in Mexico and he was like a superhero to me. Bigger than Superman or Spiderman. Was even bigger than Hogan.

Edit: Thanks for the answers!