Year Number 1996 0.546448111534119 1998 0 2000 0 2002 0 2003 0 2004 0 2005 0 2006 1.46341466903687 2007 1.94174754619598 2008 1.45631062984467 2009 3.34928226470947 2010 2.39234447479248 2011 3.3175356388092 2012 4.26540279388428 2013 1.42180097103119 2014 3.8461537361145 2015 3.33333325386047 2016 4.7619047164917 2017 4.7619047164917 2018 4.7619047164917 2019 4.2857141494751 2020 2.38095235824585 2021 3.33333325386047 2022 1.88679242134094