Year	Percent
1994	61.88865
1995	60.40602
1996	61.23593
1997	60.61031
1998	58.32728
1999	59.05884
2000	61.52191
2001	61.44248
2002	60.16209
2003	59.58051
2004	69.48011
2005	71.62905
2006	73.38574
2007	71.35039
2008	72.22819
2009	68.9941
2010	71.9512
2011	73.27279
2012	73.01775
2013	72.04029
2014	72.76888
2015	73.03021
2016	73.03021
2017	76.03391