Year Number 1996 98.9130401611328 1998 96.1956558227539 2000 98.3695678710938 2002 99.4594573974609 2003 99.4594573974609 2004 99.5024871826172 2005 100 2006 99.5098037719727 2007 99.5145645141602 2008 98.0582504272461 2009 100 2010 100 2011 99.5260696411133 2012 98.5782012939453 2013 99.052131652832 2014 99.5192337036133 2015 99.0476226806641 2016 100 2017 99.523811340332 2018 99.0476226806641 2019 99.523811340332 2020 99.523811340332 2021 99.523811340332 2022 99.5283050537109