Some surprises there. I was a little surprised to see a supposedly staunchly Catholic country like Italy at only 50%, and mostly Islamic Turkey at only 43%, and I'm surprised Russia's as high as it is. Among modern western nations the United States is clearly an anomaly, but I knew about that one. I'd be interested to see those results correlated with indicators of socioeconomic development and quality of life. I expect we'd find a pretty consistent inverse relationship between those indicators and levels of religiosity, again with the U.S. standing out as an anomaly.
Italy is not as staunchly Catholic as you might think. Remember that Italy allowed unrestricted access to abortion before Canada did. Italians take their religion with a grain of salt. If it gets in the way of practical matters then they simply ignore it.
As for Turkey, the nation is constitutionally secular. Kemal Ataturk outlawed the influence of Islam in politics when he instituted his sweeping reforms in the 1920s; reforms which included dropping Arabic as a system of writing and substituting the Western alphabet.
The US as you say is an anomaly, with most Americans professing religious beliefs, but ignoring them for the most part in day to day life. How else do you explain the childish bleeping of profanity on radio and TV while at the same time allowing places like Las Vegas to flourish? Regular church attendance in the US is only about 42% with the highest percentage attendance in those states that have the lowest living standard.
Like many surveys of this sort the survey is somewhat limited as it focuses on only a few nations.
