99%. I just don’t answer Anonymous calls because nothing good comes from that.
But there was a time where I could not even answer unknown numbers because I was in some kind of spam database and got 5-10 calls a day. It went on for weeks and they changed the number every time. Simply hitting decline didn’t stop it. I ended up setting my phone to block all calls not in my contact list (while still looking into my caller list occasionally) and a few weeks later it stopped. Now I became more trustful again.