Year Number 1996 73.9361724853516 1998 74.4680862426758 2000 59.2592582702637 2002 71.4285736083984 2003 65.3266296386719 2004 50.970874786377 2005 56.7961158752441 2006 55.0724639892578 2007 70.0483093261719 2008 77.8846130371094 2009 81.5165863037109 2010 84.3601913452148 2011 85.7819900512695 2012 86.2559204101563 2013 81.5165863037109 2014 76.1904754638672 2015 74.7619018554688 2016 63.3333320617676 2017 64.2857131958008 2018 62.7358474731445 2019 65.5660400390625 2020 62.2641525268555 2021 61.3207550048828 2022 61.7924537658691