Year	Percent
1995	49.09293
1996	50.57928
1997	52.22472
1998	53.57789
1999	54.41617
2000	56.7566
2001	58.18328
2002	58.78226
2003	57.98801
2004	56.2192
2005	56.14911
2006	55.94565
2007	55.29802
2008	55.74017
2009	56.62421
2010	56.23041
2011	55.21839
2012	56.19148
2013	57.27961
2014	56.62005
2015	56.24339
2016	56.29163
2017	58.30224