: 1, Stanford University (CA) 2, University of Pennsylvania (PA) 3, Massachusetts Institute of Technology (MA) 4, Princeton University (NJ) 5, Duke University (NC) 6, Harvard University (MA) 7, Yale University (CT) 8, Cornell University (NY) 9, University of California at Berkeley.

1 1, University of California at Davis (CA) 12, Dartmouth College (NH) 13, Brigham Young University (UT). 14, California Institute of Technology. (California) 15, Georgetown university (DC) 16, University of Wisconsin-Madison (WI). 17, IL-urbana-Champaign University (IL) 18, National University of Lewis (IL) 19, University of Illinois at urbana-Champaign, seattle university WA- seattle university (WA) 20 and University of California, San Diego (CA) are for reference only.