Where can i find dropout rate statistics?

Im doing an essay about the dropout rate & i googled alot of statistics but ive only been able to find statistics by ethnicity or by state. Ive been looking for statistics of the grade level (9th 10th 11th etc) has the highest drop out rate (my teacher told me it was 9th grade but i need #'s) Im also looking for by gender and stuff any good websites you recomend PLEASE HELP!! (its due tuedays) Ahh i hate finals lol.