I’d say I’m hovering around the 60% mark.
I don’t answer calls from numbers I don’t recognise, unless it identifies someone I’m expecting a call from with the “maybe” thing. I don’t use my phone for work (often). I don’t call people to catch up, I’d rather IM. My mother or my best friend call and I ignore them more often than I probably should.
But really I just don’t like talking on the phone that much.
I’ve found if you accidentally take a spam call it can be fun to string them along and waste their time for a good 30m if you’ve got time to kill, the humour is great but it also gets you blacklisted for a while and they stop calling