Year	Percent
1982	2.29
1983	2.94
1984	2.57
1985	3.09
1986	2.36
1987	1.25
1988	0.8
1989	0.71
1991	1.18
1992	1.54
1993	1.66
1994	1.69
1995	2.95
1996	2.32
1997	1.72
1998	4.12
2000	5.33
2001	4.82
2002	7.9
2003	8.85
2004	8.83
2005	6.82
2006	5.37
2007	4.35
2008	3.4
2009	4.96
2010	4.03
2011	2.93
2012	2.72
2013	3.15
2014	3.14
2015	2.84
2016	2.8
2017	2.9
2018	2.31
2019	2.78
2020	5.98