Year % 2001 1.1968807658565546 2002 1.0308181346146919 2003 0.8494345166535291 2004 0.7289242976332972 2005 0.7558123351982645 2006 0.6087663791478557 2007 0.922033931100027 2008 1.5362162029043673 2009 0.6866052264453901 2010 0.5102141863517591 2011 0.49217609416643904 2012 0.4662715721326772 2013 1.2131873768152022 2014 1.057941150982835 2015 1.0029055849343402 2016 0.9522850651689573 2017 1.0155012056495776 2018 1.0214904804468512 2019 1.490224656068261 2020 4.253643493171625 2021 16.472848746530104 2022 15.510234541852451 2023 11.936399700603776