Year	Percent
1976	0.86
1978	0.15
1979	0.29
1980	0.46
1982	2.52
1984	4.69
1987	6.48
1988	2.63
1989	1.03
1990	1.64
1994	1.56337
1996	0.95133
1997	0.86734
1998	3.23849
1999	2.75865
2000	2.21652
2001	1.56
2003	0.78
2004	0.88
2005	0.71
2006	0.57
2007	0.61
2008	0.58
2009	0.9
2010	0.3563
2011	0.33
2012	0.25
2013	0.2395
2014	0.2528
2015	0.3207
2016	0.3687