Year	Percent
2000	64.04257
2001	65.29825
2002	66.55393
2003	67.80962
2004	69.0653
2005	70.32098
2006	71.57666
2007	72.83234
2008	74.08802
2009	75.3437
2010	76.59938
2011	77.85506
2012	79.11074
2013	80.36642
2014	80.36642
2015	80.36642
2016	80.36642
2017	80.36642