I would say then that your pool of available "Born Again Christians" is very small, or you live in an odd part of the country, or you have a specific, rigid definition of what a "Born Again Christian" is that one who does NOT believe in a Young Earth would not count in your eyes as a "Born Again Christian".
Keep in mind, though, that in most parts of the country there's a really big difference between "Christian" and "Born again Christian." The "Born Again" movement is a sales pitch for the Evangelical movement, of which Young Earth Creationism is a significant (and highly influential) subset. It's not the kind of crap you usually hear from, say, Methodists or Catholics, but mostly Evangelicals and southern baptists hold this as an article of faith at least as important, if not more so, that the divinity of Christ.