Asia, land of the godless & godly

A comment below prompted me to slap together a post quickly displaying some data which illustrates just how religious South Asians are compared to East Asians. Anyone with an interest in world history will not be surprised by this assertion. When reading surveys of East Asian history I would occasionally reach a chapter titled "Religion," and the author would offer a quick explanation and apologia for why the topic was not given pride of place. By contrast, some have argued to a first approximation South Asian history is a history of South Asian religion. (Though I do not focus on that issue in this post, the "Islamic world" is strongly defined by religious identity as well) But how about the Diaspora communities? Where I have seen data the patterns seem to recapitulate themselves, more or less. Singapore, Canada and the United Kingdom collect data broken down both by religion and ethnicity. The United States has surveys performed by academic institutions, but unlike a national census the sample sizes are modest enough that I would not trust them much when it comes to very small minorities. Finally, I can use the World Values Survey to look at religious attitudes in the "homelands." First, Canada: