Year Number 1996 72.8723373413086 1998 69.6808547973633 2000 79.8941802978516 2002 77.7777786254883 2003 59.2964820861816 2004 58.737865447998 2005 66.019416809082 2006 53.6231880187988 2007 47.3429946899414 2008 44.230770111084 2009 41.2322273254395 2010 49.7630348205566 2011 60.1895751953125 2012 57.3459701538086 2013 60.1895751953125 2014 64.2857131958008 2015 62.8571434020996 2016 70.9523773193359 2017 66.6666641235352 2018 65.0943374633789 2019 68.3962249755859 2020 72.6415100097656 2021 77.3584899902344 2022 68.3962249755859