Year	Percent
2000	46.81421
2001	47.12043
2002	47.44092
2003	47.77522
2004	48.12342
2005	48.48441
2006	48.85949
2007	49.24695
2008	49.6487
2009	49.81032
2010	49.97738
2011	50.15053
2012	50.32917
2013	50.70513
2014	51.08356
2015	51.46509
2016	51.84972