Christian faith among research scientists

Francis Collins (The language of God) reports:
In 1916, researchers asked biologists, physicists and mathematicians whether they believed in a God who actively communicates with humankind and to whom one may pray in expectation of receiving an answer. About 40 percent answered in the affirmative. In 1997 the same survey was repeated verbatim-- and to the surprised of the researchers, the answer was very nearly the same' p 4