Year	%
2000	58.0641682769734
2001	58.02381398700218
2002	57.89372128631983
2003	57.78352029658225
2004	57.60673145354291
2005	57.42926535280865
2006	57.226498286243434
2007	57.0100051658289
2008	56.715648557853775
2009	56.47034958801886
2010	56.21441577589047
2011	55.95287366086126
2012	55.71254783324297
2013	55.51708809640928
2014	55.25263253376997
2015	55.049210282640104
2016	54.78296341096031
2017	54.53150963089073
2018	54.2372309314699
2019	53.9819332303311