Year Number 2004 72.3300933837891 2005 68.4466018676758 2006 68.1159439086914 2007 80.1932373046875 2008 80.7692337036133 2009 82.4644546508789 2010 80.0947875976563 2011 74.407585144043 2012 78.6729888916016 2013 76.7772521972656 2014 89.0476226806641 2015 90.9523773193359 2016 91.4285736083984 2017 91.9047622680664 2018 91.0377349853516 2019 90.5660400390625 2020 87.7358474731445 2021 87.7358474731445 2022 91.0377349853516