Year	Percent
1994	43.24419
1995	42.68678
1996	50.08264
1997	39.72029
1998	37.8059
1999	42.89248
2000	55.32357
2001	65.61288
2002	61.4661
2003	71.71397
2004	82.15452
2005	90.58641
2006	87.13712
2007	82.64464
2008	78.11342
2009	62.33929
2010	62.79835
2011	67.71838
2012	61.78111
2013	56.66265
2014	52.37274
2015	48.62799
2016	57.17512
2017	59.88054