70ish. My number assumes that "met with someone you know who lives there" only includes people who you visited their home when you were travelling in the foreign country. That is, I didn't include that I have been to New Zealand and know someone who was born there. I would only count New Zealand if I visited his house in New Zealand while he was there. If I just included any country where I happen to know someone and also visited, then my number would be 90ish. Being tightly connected to a university means I know many different nationalities.
My personal metric for visiting a country is "did I eat a meal outside of a port". Airports, train stations, seaports, don't count for me. Just driving through doesn't count either. I only count visiting a country if I spent real time there, walking around, interacting with at least a waiter, etc. As in, I'm not counting Senegal (see my post above) even though I have been in the Dakar, Senegal airport tarmac 6 different times.