Year	Percent
1994	46.14302
1995	43.54906
1997	17.19798
1998	32.49054
1999	41.16798
2001	51.2973
2002	59.92531
2003	66.63964
2004	77.65001
2005	86.95875
2006	89.40927
2007	90.75571
2008	85.94242
2009	83.30948
2010	85.1999
2011	87.48932
2012	93.21323
2013	94.21197
2014	96.66373
2015	95.53391
2016	92.43413