Year	Percent
1983	1.52
1985	7.8
1986	8.51
1987	29.98
1988	11.15
1989	11.11
1990	6.64
1991	9.03
1993	9.77
1995	10.34
1996	9.33
1998	7.06
1999	6.43
2000	6.25
2002	4.4
2005	5.71
2006	3.8
2007	4.21
2008	2.73
2009	1.99
2010	1.99
2011	1.65
2012	1.84
2013	1
2014	0.7
2015	0.98
2016	1.06