Season 1 Seven Network , 2004 Season 2 Seven Network , 2005 Season 3 Seven Network , 2005 Season 4 Seven Network , 2006 Season 5 Seven Network , 2006 Season 6 Seven Network , 2007 Season 7 Seven Network , 2007 Season 8 Seven Network , 2008 Season 9 Seven Network , 2009 Season 10 Seven Network , 2010 Season 11 Seven Network , 2011 Season 12 Seven Network , 2012 Season 13 Seven Network , 2013 Season 14 Seven Network , 2014 Season 15 Seven Network , 2015 Season 16 Seven Network , 2019 Season 17 Seven Network , 2020 Season 18 Seven Network , 2021 Season 19 Seven Network , 2022 Season 20 Seven Network , 2023