Are you still friends with any of the friends you made at high school or in early 20s?

Curious to see how common is it to stick to the same friends throughout life versus friend group constantly changing throughout life, and is the country you live in a factor in all of this (i.e. some countries like the US, everyone says people are very friendly, so I'm guessing it's easier to continually make new friends, relative to countries that aren't like this)