Year Number 2004 41.7910461425781 2005 75.9803924560547 2006 65.1960754394531 2007 58.2524261474609 2008 53.3980598449707 2009 54.5454559326172 2010 51.1961708068848 2011 51.6587677001953 2012 48.8151664733887 2013 46.445499420166 2014 49.038459777832 2015 48.0952377319336 2016 47.1428565979004 2017 46.1904754638672 2018 48.5714302062988 2019 46.1904754638672 2020 46.6666679382324 2021 47.1428565979004 2022 47.6415100097656