Little Toe,
You wrote:
To do that accurately you'd have to take a country by country demongraphic. Most bible-based religions are seeing increase in the third-world and decline in the first-world.
It is certainly true that religious participation is declining in the western world, but I do not think it is so straight-forwardly true that "bible-based religions are increasing in the third-world". Some denominations are certainly doing very well in the third world, Pentecostals in South America being perhaps the most talked about example. However what seems to be happening is that many are swapping denominations within Christianity in such countries rather than there being an upsurge in Christianity as a whole. In Brazil for example the Catholic Church is hemoraging millions of adherents to the Pentecostals. A famous scholar concerned with the secularization thesis, David Martin, was so impressed by the success of Pentecostal groups in South America that it forced him to reconsider his view that the secularization process, well-documented in many developed countries, would be replicated in developing countries as a matter of course hand in hand with their modernization.
Other scholars such as Grace Davie picked up on this, and also focussed on American particularism among developed countries to make the argument that Europe has in fact turned out to be be the exceptional case rather than the forerunner in its secularity contrary to what many social scientists had anticipated. However debate over the success stories of denominations such as the Pentecostals has been fleshed out in recent years by studies that have explored the deeply political roots and consequences of mass conversions in countries such as Brazil, making the claim to success of Pentecostals and other denominations in third world countries not as straight-forward a phenomenon as it once appeared.
So what I am trying to say is that 1) trends in developed countries will differ radically in their root causes as well as likely in their outcomes from developing countries necessarily because such trends are the result of the working out of deep historical and societal forces and 2) "success stories" in the third world and even in the USA as far as religious participation is concerned are more complicated than meets the eye.
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As a matter of interest, in Scotland between 1984 and 1994 attendance at Church of Scotland services declined by a whopping -19% and then by an even greater -22% in the eight years between 1994 and 2002. (these are the figures from Peter Brierley of Christian Research Institute)
Over the same periods all the free Presbyterian churches in Scotland combined decreased by -19% and then by -5%.
Over those periods Jehovah's Witness publishers in Britain as a whole increased by 32% and then decreased by -3%.
Not a bad record in a country undergoing rapid secularization.
Slim