I did when I was 19 but my parents supported me still, but then I came back to live with my dad at 20 because it's so much better and $ efficient. I'm grateful that he lets me live here now.
18 was the first time I "moved out" but I don't really count that considering I was living on campus and still going home for the summer. I got my first apartment at 20.
I went to boarding school at age and have lived outside my house since then. I went back once in a while but mostly live with my friends until I was 19. Then now, I'm studying in Australia (originally from Malaysia) and living in Melbourne. And I'm 22. So, does this count?