Year Number 1996 86.1702117919922 1998 81.3829803466797 2000 73.5449752807617 2002 86.7724838256836 2003 82.4120635986328 2004 80.0970840454102 2005 81.5533981323242 2006 70.5314025878906 2007 78.260871887207 2008 76.9230804443359 2009 71.0900497436523 2010 67.2985763549805 2011 76.3033142089844 2012 79.620849609375 2013 78.1990509033203 2014 68.0952377319336 2015 83.8095245361328 2016 86.6666641235352 2017 80 2018 76.8867950439453 2019 75 2020 75.4716949462891 2021 74.5283050537109 2022 75.4716949462891