As a college student, how many hours of sleep do you usually have?

I'm genuinely curious. Ever since I was a kid, i've always had eight hours of sleep (usually by 10pm) because my mom would reprimand us if we weren't asleep by our personal curfew hour haha. i'm very thankful for her and dad's discipline honestly, because i probably wouldn't have a good sleep schedule up till now if it weren't for them. but a lot of my peers don't sleep at all - or they sleep for at least three to four hours (which is concerning).