I would have to say that I assumed about 90-95% of people would be believers. Seeing the results of this poll has me kind of shocked. I would bet that most of the undecided in rough times would be swayed to becoming believers.
One point that many of the critics of "religion" forget (Keep in mind i do not follow any organized religion myself) is that at the foundation most religions are exactly the same. I'll use a football analogy... All 32 NFL teams have different strategies. For example, The buffalo bills were supposed to be a smash mouth, running team. The Colts were All out passing, etc etc.... In the end all of the teams have the ultimate goal of moving the football and reaching the endzone. The endzone to me is what we call "life after death" All religions acknowledge the life after death aspect. However their approaches to getting there are all different, hence are you a running team, a passing team, or a defensive 3-4/4-3 team. All are different in their own respect, but all have the same ultimate goal and philosophy. Just my take on it.