Year Number 1996 77.1276626586914 1998 79.7872314453125 2000 80.9523773193359 2002 78.8359756469727 2003 76.3819122314453 2004 76.6990280151367 2005 58.2524261474609 2006 57.0048294067383 2007 57.487922668457 2008 57.6923065185547 2009 58.2938385009766 2010 63.5071105957031 2011 59.2417068481445 2012 62.5592422485352 2013 61.1374397277832 2014 72.3809509277344 2015 71.4285736083984 2016 86.1904754638672 2017 83.8095245361328 2018 83.0188674926758 2019 79.7169799804688 2020 86.3207550048828 2021 86.3207550048828 2022 85.3773574829102