Year Number 1996 84.4085998535156 1998 84.4919815063477 2000 85.1063842773438 2002 91.0052947998047 2003 90.476188659668 2004 91.625617980957 2005 88.2926864624023 2006 82.4390258789063 2007 83.4951477050781 2008 83.980583190918 2009 80.3827743530273 2010 80.9523773193359 2011 80.0947875976563 2012 83.4123229980469 2013 81.0426559448242 2014 82.6923065185547 2015 81.9047622680664 2016 81.4285736083984 2017 81.9047622680664 2018 81.4285736083984 2019 80 2020 78.5714263916016 2021 77.1428604125977 2022 79.2452850341797