| Year | Winner | % Correct |
|---|---|---|
| 2013 | 90%
| |
| 2008 | 90%
| |
| 2012 | 90%
| |
| 2019 | 90%
| |
| 2021 | 90%
| |
| 2002 | 90%
| |
| 2004 | 90%
| |
| 2022 | 90%
| |
| 2000 | 90%
| |
| 2001 | 90%
| |
| 2003 | 90%
| |
| 2020 | 90%
| |
| 2005 | 85%
| |
| 2006 | 85%
| |
| 2007 | 85%
| |
| 2010 | 85%
| |
| 2025 | 85%
| |
| 2026 | 85%
| |
| 2014 | 85%
| |
| 2015 | 85%
| |
| 2024 | 85%
| |
| 2009 | 85%
| |
| 2018 | 85%
| |
| 2023 | 85%
| |
| 2011 | 85%
| |
| 2017 | 85%
| |
| 2016 | 85%
|