Year Number 1996 100 1998 98.4042587280273 2000 98.4126968383789 2002 71.4285736083984 2003 63.8190956115723 2004 52.9126205444336 2005 56.7961158752441 2006 74.8792266845703 2007 72.4637680053711 2008 80.288459777832 2009 76.3033142089844 2010 74.8815155029297 2011 81.0426559448242 2012 81.9905242919922 2013 81.9905242919922 2014 76.6666641235352 2015 82.3809509277344 2016 70.9523773193359 2017 65.7142868041992 2018 69.3396224975586 2019 60.8490562438965 2020 56.6037750244141 2021 57.0754699707031 2022 54.7169799804688