Year Number 1996 63.9784927368164 1998 62.0320854187012 2000 66.4893646240234 2002 77.7777786254883 2003 69.3121719360352 2004 69.9507369995117 2005 66.8292694091797 2006 60.4878044128418 2007 61.1650466918945 2008 62.6213607788086 2009 63.6363639831543 2010 62.3809509277344 2011 63.5071105957031 2012 67.7725143432617 2013 68.2464447021484 2014 62.980770111084 2015 59.0476188659668 2016 55.7142868041992 2017 50.476188659668 2018 50 2019 53.8095245361328 2020 51.9047622680664 2021 58.5714302062988 2022 59.4339637756348