Year	Percent
1994	71.91292
1995	74.36335
1996	73.25493
1997	73.04112
1998	70.93761
1999	78.74836
2000	67.12259
2001	67.34271
2002	62.81568
2003	63.41734
2004	72.47066
2005	73.96622
2006	75.0168
2007	77.81067
2008	69.60815
2009	68.01134
2010	59.0625
2011	54.68687
2012	55.85315
2013	54.53671
2014	56.69335
2015	59.47763
2016	56.80672
2017	55.6397