| Year | National Champion | % Correct |
|---|---|---|
| 2025 | British Columbia | 100%
|
| 2008 | British Columbia | 100%
|
| 2000 | Carleton | 100%
|
| 2018 | Dartmouth | 100%
|
| 2017 | Dartmouth | 100%
|
| 2024 | North Carolina | 100%
|
| 2023 | North Carolina | 100%
|
| 2022 | North Carolina | 100%
|
| 2021 | North Carolina | 100%
|
| 2015 | Oregon | 100%
|
| 2013 | Oregon | 100%
|
| 2010 | Oregon | 100%
|
| 2016 | Stanford | 100%
|
| 2007 | Stanford | 100%
|
| 2006 | Stanford | 100%
|
| 2005 | Stanford | 100%
|
| 2003 | Stanford | 100%
|
| 1999 | Stanford | 100%
|
| 1998 | Stanford | 100%
|
| 1997 | Stanford | 100%
|
| 2019 | UC San Diego | 100%
|
| 2002 | UC San Diego | 100%
|
| 2011 | UC Santa Barbara | 100%
|
| 2009 | UC Santa Barbara | 100%
|
| 1991 | UC Santa Barbara | 100%
|
| 1990 | UC Santa Barbara | 100%
|
| 1988 | UC Santa Barbara | 100%
|
| 2012 | Washington | 100%
|
| 1993 | California | 0%
|
| 2001 | Georgia | 0%
|
| 1987 | Kansas | 0%
|
| 2014 | Ohio State | 0%
|
| 2004 | UC Davis | 0%
|
| 1989 | UC Davis | 0%
|
| 1995 | UC Santa Cruz | 0%
|
| 1994 | UC Santa Cruz | 0%
|
| 1996 | UNC Wilmington | 0%
|
| 1992 | UNC Wilmington | 0%
|