Year	Percent
1983	5.47
1984	1.12
1985	0.94
1986	2.17
1987	1.12
1988	0.98
1989	0.55
1990	1.72
1991	1.27
1992	1.77
1993	5.84
1994	2.4
1995	3.57
1996	3.74
1997	3.7
1998	2.28
1999	2.75
2000	2.77
2001	1.88
2002	1.61
2003	1.83
2004	1.93
2005	1.23
2006	1.32
2007	0.66
2008	1.61
2009	1.04
2010	1.16
2011	1.07
2012	1.83
2013	1.74
2014	1.31
2015	1.79
2016	1.9
2017	1.84
2018	2.18
2019	2.17
2020	1.87