But that isn't necessarily anything about religion. I myself would call it "philosophy."
Therein lies the rub... what is religion? To no small extent, religion is a Western construct, and in my country, that construct is strongly biased towards Protestant Christian models (ironically, something directly reflected in how this poll was done). What happens when we look at what religion means outside of that box? It definitely contains what many, such as yourself, would label "philosophy." That's why I ask the question - are my people really becoming less religious or is the expression of religion becoming less constrained by Protestant Christian (or Abrahamic in general) norms?
It's probably a bit of both, really. Is it worth teasing out the details? I'm not sure. Again, religion is something of a construct, so doing that is an academic exercise more than anything else. In general, I think it would be more insightful to look at various aspects associated with religions and see how they are operating regardless of religious affiliation. For example, what do people identify as their most deeply held values? What practices do people engage in that celebrate things they value or find important? How do folks cultivate supportive communities that nurture well-being and relationships? That's the substance of religion.... I'm interested in that regardless of whether the "religion" label is slapped on it or not.