Year	Percent
1994	43.89066
1995	53.32419
1996	50.40315
1997	47.54643
1998	50.15371
1999	55.48784
2000	50.95896
2001	70.52489
2002	67.30559
2003	48.08629
2004	44.68736
2005	49.37562
2006	52.5554
2007	54.90331
2008	47.97383
2009	51.90218
2010	53.12182
2011	48.66405
2012	51.74777
2013	49.38801
2014	52.45479
2015	48.68515
2016	49.85098