http://www.pewresearch.org/fact-tank/2015/12/23/americans-are-in-the-middle-of-the-pack-globally-when-it-comes-to-importance-of-religion/

"Overall, people in wealthier nations tend to place less importance on religion than those in poorer nations. However, the United States – the wealthiest nation included in the 2015 global survey based on gross domestic product per capita – is a notable exception to this trend."