Year	Percent
1984	1.01
1985	1.98
1986	4.27
1987	0.75
1988	1.59
1989	0.78
1991	0.7
1992	0.58
1993	1.68
1994	0.51
1995	0.6
1996	1.85
1997	1.56
1998	1.08
1999	4.52
2001	1.84
2002	3.52
2003	3.39
2004	2.8
2006	3.83
2007	2.69
2008	3.89
2009	5
2010	3.11
2011	3.88
2012	4.75
2013	4.12
2014	3.54
2015	4.54
2016	4.13