Everyone keeps writing up/sharing/posting this article, but no one has any actual numbers of search results. The 100 line is just a representation of when it was searched over the past thirty days. It's not a representation of how many people actually searched it. That 100 mark could have just been 20 people for all we know.
Yeah, and how much was that day? Still a pretty meaningless percentage when there isn't a real number to see. You can at least assume it was well over 20 people, based on that.