Thanks for this interesting analysis!
One small note: the MCF survey results in your first chart appear to sum to ~104% rather than 100%. It looks like the other two sources in the comparison do sum to 100%, which might make direct comparison a bit tricky.
This could just be a rounding artefact, or perhaps the survey methodology allowed responses that didn’t need to sum to 100% - but given some of the percentage differences between sources are fairly small, it might be worth a quick note explaining the discrepancy (or normalising the MCF data if appropriate).
Flagging mainly because I found myself a bit distracted by this when trying to interpret the comparison, and I imagine other readers might have the same reaction.
Was going to ask the same about Italian!
I’ve been trying to explain EA to my (often Catholic) Italian family and friends for a long time—I think they’d be very receptive to this book.