On the flipside of course, 60% of Americas do believe humans evolved over time. Note that this figure does not distinguish between those that believe evolution is a purely natural phenomenon versus those that think that god had a hand in it.
I am not entirely positive and perhaps the other forum members can provide insight, but I believe the numbers that rejected evolution used to be much higher? As high as 50% at one point.
It does appear as though Creationism and ID are falling to the wayside. My suspicion is that the internet age coupled with the fallout from the Dover Trial probably drove several nails into the Creationism coffin.
When fundamentalists teach people outright falsehoods under the guise of religious truth, then as these are exposed by education the people lose faith, sometimes catastrophically
One of the reasons the 'Clergy Project' was founded. To help people who actually made a career out of evangelizing come to grips with their loss of faith after reality sets in.
Your post about the individual that committed suicide reminded me of a video interview I saw that had Richard Dawkins comment on a former colleague of his. A Geologist who was apparently really bright and had the potential for great success in his field. But he was raised in a strict religious upbringing and could never reconcile the facts with his dogma. Unfortunate that a great mind was poisoned so early.