Year Number 1996 71.8085098266602 1998 59.5744667053223 2000 75.661376953125 2002 88.3597869873047 2003 80.9045257568359 2004 73.7864074707031 2005 75.2427215576172 2006 65.7004852294922 2007 69.5652160644531 2008 64.4230804443359 2009 67.7725143432617 2010 66.3507080078125 2011 65.8767776489258 2012 62.0853080749512 2013 63.5071105957031 2014 73.3333358764648 2015 68.5714263916016 2016 72.3809509277344 2017 73.8095245361328 2018 73.5849075317383 2019 67.9245300292969 2020 71.2264175415039 2021 68.3962249755859 2022 63.2075462341309