Year Number 1996 66.3043441772461 1998 66.3043441772461 2000 67.9347839355469 2002 71.8918914794922 2003 72.4324340820313 2004 70.6467666625977 2005 70.5882339477539 2006 72.5490188598633 2007 67.9611663818359 2008 70.3883514404297 2009 64.5932998657227 2010 65.5502395629883 2011 65.8767776489258 2012 64.4549789428711 2013 64.4549789428711 2014 61.538459777832 2015 60.9523811340332 2016 58.0952377319336 2017 60 2018 50.476188659668 2019 55.238094329834 2020 53.3333320617676 2021 49.523811340332 2022 44.3396224975586