Year	Percent
1995	57.95794
1996	73.91702
1997	74.28637
1998	75.03825
1999	67.41972
2000	75.43139
2001	73.53493
2002	77.93392
2003	87.24664
2004	82.00039
2005	91.67175
2006	91.89767
2007	97.14085
2008	93.60353
2009	73.4912
2010	78.54521
2011	85.82946
2012	83.94184
2013	80.59596
2014	78.52655
2015	73.8634
2016	71.26993
2017	70.66324