| 1 (31) | University of Florida * | USA |  |
| 2 (52) | University of Maryland, College Park * | USA | |
| 3 (74) | Oregon State University | USA | |
| 4 (75) | Purdue University | USA | |
| 5 (80) | University of Nebraska, Lincoln | USA | |
| 6 (106) | University of California, Davis * | USA | |
| 7 (116) | North Carolina State University | USA | |
| 8 (119) | University of Georgia | USA | |
| 9 (123) | University of Illinois at Urbana-Champaign * | USA | |
| 10 (125) | University of Michigan, Ann Arbor * | USA | |
| 11 (128) | Columbia University * | USA | |
| 12 (139) | California Institute of Technology * | USA | |
| 13 (141) | Colorado State University, Fort Collins * | USA | |
| 14 (149) | University of Wisconsin, Madison * | USA | |
| 15 (172) | Texas A&M University, College Station * | USA | |
| 16 (173) | Michigan State University | USA | |
| 17 (177) | University of California, Los Angeles * | USA | |
| 18 (183) | University of California, Berkeley * | USA | |
| 19 (187) | University of Idaho * | USA | |
| 20 (189) | Cornell University * | USA | |
| 21 (196) | University of Massachusetts, Amherst | USA | |
| 22 (206) | University of Washington * | USA | |
| 23 (211) | Utah State University * | USA | |
| 24 (220) | Pennsylvania State University * | USA | |
| 25 (225) | University of Minnesota, Twin Cities * | USA | |
| 26 (236) | Washington State University, Pullman * | USA | |
| 27 (238) | University of Utah * | USA | |
| 28 (239) | Harvard University * | USA | |
| 29 (248) | Mississippi State University | USA | |
| 30 (250) | Northern Arizona University | USA | |
| 31 (262) | Virginia Polytechnic Institute and State University * | USA | |
| 32 (264) | Auburn University | USA | |
| 33 (267) | University of Arizona * | USA | |
| 34 (292) | Iowa State University | USA | |
| 35 (294) | University of Vermont | USA | |
| 36 (306) | Arizona State University * | USA | |
| 37 (318) | University of Tennessee, Knoxville * | USA | |
| 38 (327) | University of Missouri, Columbia * | USA | |
| 39 (346) | Ohio State University, Columbus * | USA | |
| 40 (358) | University of Montana, Missoula | USA | |
| 41 (375) | University of Wyoming | USA | |
| 42 (380) | University of Colorado, Boulder * | USA | |
| 43 (398) | Kansas State University | USA | |
| 44 (455) | University of California, Santa Barbara * | USA | |
| 45 (464) | University of Maine, Orono | USA | |
| 46 (467) | University of New Hampshire | USA | |
| 47 (472) | University of California, Irvine * | USA | |
| 48 (476) | Louisiana State University, Baton Rouge | USA | |
| 49 (486) | Clemson University | USA | |
| 50 (489) | Michigan Technological University | USA | |
| 51 (493) | State University of New York, College of Environmental Science and Forestry | USA | |
| 52 (526) | University of Connecticut, Storrs * | USA | |
| 53 (531) | Florida International University | USA | |
| 54 (543) | West Virginia University * | USA | |
| 55 (553) | University of Kentucky * | USA | |
| 56 (559) | University of Nevada-Reno | USA | |
| 57 (590) | University of Alaska, Fairbanks | USA | |
| 58 (656) | University of Wisconsin, Stevens Point | USA | |
| 59 (703) | University of Arkansas, Fayetteville | USA | |
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