One of the really useful features of the new edition of Evolution vs. Creationism: An Introduction by Genie Scott is the coverage of the socio-cultural context of the so called “debate” between Creationists and Evolutionary Biologists. This tidbit is an example:
The obvious patterns are interesting. There is a modest drop in overall religiousity over the last twenty years. This drop is entirely acounted for by a drop in Christianity specifically. And the biggest change overall (percentage wise, doing the figures in my head so this is subject to revision) is an increase in the “No religion” category.
Note also that the “Refused to state” category fluctuates dramatically. It is a small number so this may be spurious, but it is interesting. What does that mean?