Year	Percent
1994	20.94619
1995	30.84777
1996	31.50257
1997	29.13833
1998	32.35262
1999	31.88539
2000	30.13125
2001	30.81185
2002	29.29558
2003	27.88184
2004	28.19967
2005	28.39813
2006	28.92655
2007	29.71413
2008	28.93029
2009	30.26275
2010	29.21734
2011	28.27902
2012	26.95445
2013	28.95084
2014	27.80996
2015	27.46586
2016	29.3365