Compe-
|
Date |
Institution |
Compe-
|
Date |
Institution | |
| 1st | 4/16/38 | University of Toronto | 2nd | 3/4/39 | Brooklyn College | |
| 3rd | 3/2/40 | University of Toronto | 4th | 3/1/41 | Brooklyn College | |
| 5th | 3/7/42 | University of Toronto | 6th | 6/1/46 | University of Toronto | |
| 7th | 5/24/47 | Harvard University | 8th | 3/20/48 | Brooklyn College | |
| 9th | 3/26/49 | Harvard University | 10th | 3/25/50 | California Institute of Technology | |
| 11th | 3/31/51 | Cornell University | 12th | 3/22/52 | Queen's University | |
| 13th | 3/23/53 | Harvard University | 14th | 3/6/54 | Cornell University | |
| 15th | 3/5/55 | Harvard University | 16th | 3/3/56 | Harvard Univesity | |
| 17th | 3/2/57 | Harvard University | 18th | 2/8/58 | Polytechnic Institute of Brooklyn | |
| 19th | 11/22/58 | Harvard University | 20th | 11/21/59 | Polytechnic Institute of Brooklyn | |
| 21st | 12/3/60 | University of California, Berkeley | 22nd | 12/2/61 | Michigan State University | |
| 23rd | 12/1/62 | California Institute of Technology | 24th | 12/7/63 | Michigan State University | |
| 25th | 12/5/64 | California Institute of Technology | 26th | 11/20/65 | Harvard University | |
| 27th | 11/19/66 | Harvard Universtiy | 28th | 12/2/67 | Michigan State University | |
| 29th | 12/7/68 | Massachusetts Institute of Technology | 30th | 12/6/69 | Massachusetts Institute of Technology | |
| 31st | 12/5/70 | University of Chicago | 32nd | 12/4/71 | California Institute of Technology | |
| 33rd | 12/2/72 | California Institute of Technology | 34th | 12/1/73 | California Institute of Technology | |
| 35th | 12/7/74 | University of Waterloo | 36th | 12/6/75 | California Institute of Technology | |
| 37th | 12/4/76 | California Institue of Technology | 38th | 12/3/76 | Washington University, St. Louis | |
| 39th | 12/2/78 | Case Western Reserve University | 40th | 12/1/79 | Massachusetts Institue of Technology | |
| 41st | 12/6/80 | Washington University, St. Louis | 42nd | 12/5/81 | Washington University, St. Louis | |
| 43rd | 12/4/82 | Harvard University | 44th | 12/3/83 | California Institue of Technology | |
| 45th | 12/1/84 | University of California, Davis Washington University, St. Louis |
4 6th | 12/7/85 | Harvard University | |
| 47th | 12/6/86 | Harvard University | 48th | 12/5/87 | Harvard University | |
| 49th | 12/3/88 | Harvard University | 50th | 12/2/89 | Harvard University | |
| 51st | 12/1/90 | Harvard University | 52nd | 12/7/91 | Harvard University | |
| 53rd | 12/5/92 | Harvard University | 5 4th | 12/4/93 | Duke University | |
| 55th | 12/3/94 | Harvard University | 56th | 12/2/95 | Harvard University | |
| 57th | 12/7/96 | Duke University | 58th | 12/6/97 | Harvard University | |
| 59th | 12/5/98 | Harvard University | 60th | 12/4/99 | University of Waterloo |