I just finished my 2nd year...and I would say, on average, I got about 5-6 hours of sleep. But, that was NOT during finals week when 3 hours was good and not if there was a really, really busy week. Also, if you participate in certain activities like foal team or emergency team where you could get called in during the middle of the night or have a shift in the middle of the night - that can cut down on your zzz's too!