Year	%
2000	1.188822630408374
2001	1.1495127337846485
2002	1.090672400287862
2003	1.038874109008699
2004	1.0049583101362571
2005	0.9660762020165498
2006	0.9104260100670215
2007	0.8918252124681694
2008	0.8727808057624717
2009	0.845509516290525
2010	0.807492126938746
2011	0.7769212738899361
2012	0.7470763830003603
2013	0.7296263857966035
2014	0.7075924825715817
2015	0.6851113148814851
2016	0.6696500820109353
2017	0.6541824948761097
2018	0.6409571004367733
2019	0.6284298876924831
2020	0.6020638104336151