In the US, I've had my number for about as long as GP and get something like one spam call every couple of months.

I get spam on my landline about once a year in Germany. It woke me up from a nap yesterday. :(

I haven’t had a landline for nah on 15 years - well not one connected since it remains a requirement to have one if you have DSL at home in Germany.

Occasionally I check the caller list on my dsl box - probably low single figure spam calls per year.