Year	Percent
1994	44.87576
1995	44.33867
1996	43.72574
1997	48.28081
1998	51.09563
1999	60.04079
2000	67.28336
2001	65.89286
2002	60.34277
2003	61.69758
2004	64.16822
2005	65.08504
2006	62.81773
2007	60.27737
2008	61.36235
2009	51.13488
2010	62.31968
2011	72.61971
2012	76.47241
2013	72.7178
2014	67.99808
2015	56.05587
2016	47.48858