Year Number 1996 100 1998 100 2000 100 2002 100 2003 99.0049743652344 2004 77.8846130371094 2005 81.25 2006 88.461540222168 2007 87.0192337036133 2008 87.0192337036133 2009 85.7819900512695 2010 83.8862533569336 2011 84.0375595092773 2012 81.6901397705078 2013 84.0375595092773 2014 96.0591125488281 2015 96.0591125488281 2016 96.0591125488281 2017 96.0591125488281 2018 99.5145645141602 2019 98.0676345825195 2020 98.5507278442383 2021 98.5507278442383 2022 99.0338134765625