Year	Percent
2000	64.38163
2001	64.80603
2002	65.23043
2003	65.65483
2004	66.07922
2005	66.50362
2006	66.92802
2007	67.35241
2008	67.77681
2009	68.20121
2010	68.6256
2011	69.05
2012	69.4744
2013	69.89879
2014	69.89879
2015	69.89879
2016	69.89879
2017	69.89879