Average sleeping time for a college student?

i myself have just left college college and i found that Average sleeping time really depended on what year group u are for example in 1st to 3rd year u will sleep about 8-9 hours a night when u get to your gcse's you will get less sleep from anything from 9-0 hours sleep this is what it was like for my friends and my little brother i have a sleeping problem and only sleep about 6 hours average but for the average student i would say about 8 or 7 hours but everyone is different