Year Number 2003 100 2004 100 2005 100 2006 100 2007 100 2008 100 2009 100 2010 100 2011 100 2012 100 2013 100 2014 99.523811340332 2015 99.523811340332 2016 99.523811340332 2017 99.523811340332 2018 99.5283050537109 2019 99.5283050537109 2020 99.0566024780273 2021 99.5283050537109 2022 100