Year	Percent
1995	41.06856
1996	42.3702
1997	45.27766
1998	45.52038
1999	44.75948
2000	42.86707
2001	41.98983
2002	45.15845
2003	46.31623
2004	46.98741
2005	49.012
2006	49.2044
2007	51.22814
2008	51.29828
2009	51.72264
2010	51.1724
2011	50.36766
2012	50.90035
2013	49.65743
2014	50.41584
2015	50.02959
2016	50.09676
2017	49.9882