Mine was 2.5 years but only because I had to wait till I was 21. I could have gone out alot sooner if I was old enough. It bothers me a little that there are guys higher up in seniority than me as drivers even though I have been here 2 years longer than them in total seniority, only because of my age. At 32, I am number 41 +/- in my center, but if I hadn't had to wait I would be probably around 30 +/-. Sucks.