Year Number 2005 30.8823528289795 2006 15.1219511032104 2007 8.73786449432373 2008 6.7961163520813 2009 6.22009563446045 2010 10.5263156890869 2011 3.3175356388092 2012 2.84360194206238 2013 0.947867274284363 2014 1.92307686805725 2015 43.8095245361328 2016 45.7142868041992 2017 47.1428565979004 2018 46.1904754638672 2019 45.238094329834 2020 56.6666679382324 2021 54.2857131958008 2022 60.8490562438965