http://www.breitbart.com/news/2006/10/31/061031235233.s0l4o4wy.html
 
(The surprising part about the poll was the paragraph below from the article. I would think that 100% of Protestants, Catholics, and Born Again Christians would feel absolutely certain that God exists rather than the statistics show below.)

"Among the various religious groups, 76 percent of Protestants, 64 percent of Catholics and 30 percent of Jews said they are "absolutely certain" there is a God while 93 percent of Christians who describe themselves as "Born Again" feel certain God exists."