I'll turn 20 in the next Dec and would say I've never been drunk. When I was younger (around 6th grade) I tended to drink cider which was around 0.07 per mill or something like that but as you can believe it can't make anybody even tipsy (and honestly I didn't even try to turn tipsy but drank it when I was thirsty). Later I chose to be a teetotaller and that's how I live just now and have lived for several years. It seems I'm not going to change my attitude.
Oh, and my mom allowed me to taste wine a teenspoonful when I was 5