Year Number 1996 91.5 1998 94.5273666381836 2000 92.5373153686523 2002 92.5373153686523 2003 90.0497512817383 2004 88.9423065185547 2005 88.461540222168 2006 80.7692337036133 2007 84.6153869628906 2008 87.0192337036133 2009 90.0473937988281 2010 90.5213241577148 2011 89.6713638305664 2012 90.1408462524414 2013 88.2629089355469 2014 92.1182250976563 2015 89.6551742553711 2016 82.7586212158203 2017 76.8472900390625 2018 76.6990280151367 2019 73.9130401611328 2020 71.4975814819336 2021 70.0483093261719 2022 71.0144958496094