From Pew Global:
Recent studies document younger adults being less religious than older generations and the global religious profile changing as the population grows. Across 27 countries surveyed, more think religion plays a less important role than a more important role compared with 20 years ago, but there is substantial regional variation on this question. About two-in-ten say there has been no change.
North American and European publics are especially likely to see religion playing a diminished role in recent times. Majorities in both the U.S. (58%) and Canada (64%) say religion has a less important role than it did 20 years ago. Roughly half of Europeans surveyed (a median of 52%) say religion plays a less important in their country. The French public is split on this question, with 38% who say religion plays a less important role and 39% who say it has a more important role today. Overall, only about two-in-ten Europeans say there has been no change in the role of religion over the past 20 years.