I think an important factor is also how long you had the same number. I switch numbers every couple of years because I get a new contract and moving the number to the new company is such a hassle. Over time you share your number with more and more companies and people who sell it or get breached.

My parents had their number for ~30 years. I never get spam calls or texts. They get one once a week or so (this is in Germany, we get a lot fewer of these calls).