I think the figures for the UK would be very similar. There are plenty of laws to catch out the abusers these days and most people feel that a moderate smacking does no harm and often does a lot of good!
Of course, it doesn’t stop a kid from misbehaving for very long – but what does? It sometimes brings them back to the realization that they have to behave somewhere near acceptable to their parents, if only for the next half an hour or so.
I think the table has been turned far enough these days, if it went any further the kids would be ruling the adults even more – if that’s possible. It seemed to be getting near the time when a child under ten cannot be punished in any way and that’s crazy! As long as there is no physical or mental damage done (and I’m not talking about the ridiculous ‘do-gooder’s version of ‘damage’) then reasonable chastisement is exactly what the term suggests.