Season 1 NPO 1 Season 2 NPO 1 , 2006 Season 3 NPO 1 , 2007 Season 4 NPO 1 , 2007 - 2008 Season 5 NPO 1 , 2008 Season 6 NPO 1 , 2008 Season 7 NPO 1 , 2009 Season 8 NPO 1 , 2009 Season 9 NPO 1 , 2010 Season 10 NPO 1 , 2010 Season 11 NPO 1 , 2011 Season 12 NPO 1 , 2012 Season 13 NPO 1 , 2012 Season 14 NPO 1 , 2013 Season 15 NPO 1 , 2013 Season 16 NPO 1 , 2014 Season 17 NPO 1 , 2015 Season 18 NPO 1 , 2016
