According to the BBC:
A study using census data from nine countries shows that religion there is set for extinction, say researchers.
The study found a steady rise in those claiming no religious affiliation.
The team’s mathematical model attempts to account for the interplay between the number of religious respondents and the social motives behind being one.
The result, reported at the American Physical Society meeting in Dallas, US, indicates that religion will all but die out altogether in those countries.
The team took census data stretching back as far as a century from countries in which the census queried religious affiliation: Australia, Austria, Canada, the Czech Republic, Finland, Ireland, the Netherlands, New Zealand and Switzerland.
Nonlinear dynamics is invoked to explain a wide range of physical phenomena in which a number of factors play a part.
One of the team, Daniel Abrams of Northwestern University, put forth a similar model in 2003 to put a numerical basis behind the decline of lesser-spoken world languages.
I cant help but wonder about the lack of time frame mentioned in this article.