Year Number 1996 81.1827926635742 1998 78.0748672485352 2000 72.8723373413086 2002 80.4232788085938 2003 74.6031723022461 2004 72.4137954711914 2005 70.2439041137695 2006 74.1463394165039 2007 72.8155364990234 2008 73.3009719848633 2009 71.7703323364258 2010 70 2011 71.0900497436523 2012 72.511848449707 2013 72.0379180908203 2014 70.6730804443359 2015 72.8571395874023 2016 79.523811340332 2017 67.6190490722656 2018 66.6666641235352 2019 66.6666641235352 2020 60.476188659668 2021 67.1428604125977 2022 66.5094375610352