Those who learn biology can practice their trade and produce value.
Those who fail to learn biology and learn creationism instead find no market for their ‘skills’.
The Free Market has decided. Biology is of use and can get you a job. Creationism is of no use and nobody hires a creationist to do creationism because it is not a productive assumption.
You got an actual source for your statistics?
School boards that introduce creationism, even in conservative strongholds, get thrown out of office by the voters.
Au Contraire. Evolutionism receives an enormous annual subsidy from Taxes paid by Creationist parents, to support Evolutionist government schools.
Subsidize something, and you'll get more of it.
Eliminate the Subsidy (and for that matter, the Taxation-Disadvantage upon Creationists), and you'll get less of it.
Basic Economics.
Ergo, remove the Subsidy that Evolutionism receives from Government Schooling, and the Free Market will respond to simple Demand. This will, happily, tend to eliminate Evolutionism from all school-teaching in due time.