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 98.0952377319336 2015 99.523811340332 2016 99.523811340332 2017 97.6190490722656 2018 97.1698150634766 2019 93.3962249755859 2020 94.3396224975586 2021 94.3396224975586 2022 96.2264175415039