Year Number 2004 69.1542282104492 2005 93.6274490356445 2006 88.7254867553711 2007 85.4368896484375 2008 75.2427215576172 2009 77.511962890625 2010 74.6411514282227 2011 75.8293838500977 2012 74.8815155029297 2013 74.8815155029297 2014 76.4423065185547 2015 72.3809509277344 2016 71.9047622680664 2017 74.2857131958008 2018 75.2380981445313 2019 73.8095245361328 2020 74.7619018554688 2021 74.2857131958008 2022 75.9433975219727