Actually the link does provide the best information. The NCSE remarks on the 2004 poll in which they state that 1016 phone interviews were conducted.
I won't dispute the polls consistency in the approximate 45% creationism view. As I said, I conflated the polls you put forth with the statement the provider of the OP. Who I note has not actually provided much at all.
So yes. Creationism which includes no human evolution is still a strong opinion according to the all the Gallup polls. I apologize. I should have directed the majority of my commentary towards the OP.
As far as all the data details it appears one must have access through a university account in order to reach them. But the site you linked mentioning the number polled was what I was looking for.
There's a great writeup on the Gallup polls compared with GSS results and the nature of polls in general in order to determine how many creationists there are in the US. Only recommended reading if you do not plan on doing anything for about an hour.
The Creationists: How Many, Who, and Where? | NCSE
My interpretation from all this is that rejection of human evolution from other species is still rather strong in the United States, it covers a wider demographic than the standard Bible Belt concept and that said rejection is not a character of YEC, creationists or biblical literalists alone.
edit: The GSS (General Social Survey) does post their codebook on their website. It's more than 2,000 pages. While definitely search capable I just don't feel like going that further in depth on a Sunday afternoon.