[kqr]

That's not how statistics work. I consider myself a frequent visitor of the second results page, but even for me the CTR of the results on the second page are < 1 %, because I almost always find the thing I want on the first page.

The question ought to be "conditional on not finding the result on the first page, how likely is the user to go to the second page versus balk, or re-try a different query?"

I'm fairly confident that number is higher than 1 %, but I don't have the data.

[MonkeyMalarky]

Or alternatively, a number "significantly less than 1%" is still massive when multiplied by the number of searches google gets.