Year Number 1996 0.8179612159729 1998 0.824313879013062 2000 0.858368933200836 2002 0.624537587165833 2003 1.24491953849792 2004 0.875725924968719 2005 1.16079270839691 2006 0.936530530452728 2007 0.993910908699036 2008 1.02252972126007 2009 0.927733778953552 2010 1.00335109233856 2011 0.96656745672226 2012 0.90651535987854 2013 0.893463313579559 2014 0.81304007768631 2015 0.781251549720764 2016 0.867156803607941 2017 0.712225377559662 2018 0.719505965709686 2019 0.68628865480423 2020 0.611279487609863 2021 0.665826141834259 2022 0.661455094814301