"[R]eligious historians and scholars estimate that in 1776 as few as 10 to 17% of Americans claimed any religious affiliation at all, and that the popular attitude toward religion was one of vast indifference--though few wished to harm religious freedom" (Charles L. Harper, "The End of American Religion 'As We Know It?'" available at <http://puffin.creighton.edu/human/CSRS/news/S97-3.html>).
Yoshie