Year Number 2003 67.3366851806641 2004 74.7572784423828 2005 66.9902877807617 2006 59.9033813476563 2007 53.6231880187988 2008 55.288459777832 2009 52.1327018737793 2010 69.6682434082031 2011 75.8293838500977 2012 74.8815155029297 2013 77.2511825561523 2014 76.6666641235352 2015 75.7142868041992 2016 78.5714263916016 2017 72.8571395874023 2018 75 2019 85.8490600585938 2020 87.2641525268555 2021 88.2075500488281 2022 89.1509399414063