Year	%
2000	50.74831873059673
2001	50.54331149416746
2002	50.393511486682
2003	50.248886029526616
2004	50.064187771723944
2005	49.81503095084873
2006	49.56492409186124
2007	49.268826634079375
2008	48.927471969448156
2009	48.55078197147077
2010	48.20543222728015
2011	47.88500362317221
2012	47.551889003529844
2013	47.26416940700712
2014	46.96588869810035
2015	46.67649819022342
2016	46.45056399881661
2017	46.309312417640044
2018	46.08115746002077
2019	45.907424550280865