GPA and GRE scores for econ/math grad programs

Hello,
I am an undergraduate at a top ten university and am looking into going to economics or math grad school. Therefore, I was wondering if anyone could tell me what are the mean and median GPA and GRE for economics and mathematics masters and PhD programs at Stanford. I understand that there are factors other than grades and test scores that go into consideration, but I am only interested in knowing the grad/test stats so that I can strive for a reasonable GPA target.