Year	%
2000	1.2305631084376472
2001	1.181085410395133
2002	1.076662924185034
2003	1.0096823430632598
2004	0.9555736381161062
2005	0.893208294620186
2006	0.7927082350149119
2007	0.7556669616384898
2008	0.7104277743833973
2009	0.6656120035260988
2010	0.5972349987243445
2011	0.5673276325992399
2012	0.5196957565740183
2013	0.4834871803484513
2014	0.4391076690240744
2015	0.41019168243609133
2016	0.38634420867380337
2017	0.3700331011844111
2018	0.3526201303075828
2019	0.3380980596534841
2020	0.3079318964960855