Year Number 1996 91.3978500366211 1998 90.3743286132813 2000 89.361701965332 2002 91.0052947998047 2003 89.4179916381836 2004 85.2216720581055 2005 82.4390258789063 2006 88.2926864624023 2007 83.4951477050781 2008 82.5242691040039 2009 81.339714050293 2010 80.9523773193359 2011 81.0426559448242 2012 82.9383850097656 2013 82.4644546508789 2014 82.211540222168 2015 86.6666641235352 2016 90 2017 81.4285736083984 2018 81.4285736083984 2019 81.4285736083984 2020 79.0476226806641 2021 83.8095245361328 2022 82.0754699707031