Religious association of Nobel Prize winners

How many Nobel Prize winners believe in God? Is anybody able to answer that question?
I know it’s almost impossible to give exact number, however someone told me lately, that only 3% of them is associated with any religion. I think that is ridiculously low number, even if we look only at scientists. However I cannot back up that believe. I can’t find any statistics on that subject on the Internet. Anyone can help?

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