Do colleges know if we're in the top 10% of our class even if my school doesn't rank?

I go to a highly competitive public school where no ranks are given. I was just worrying because I know for a fact that I’m between the top 10-15% of my class (which is over 10%, so I’m assuming that’s pretty bad for the colleges that I’m applying to). Because I know a kid who got 4.0 UW during his junior year but never took a single AP (just an example for what probably happens to other kids at my school as well), and it seems that colleges are fed up whether you’re in the top 10% or not.