Year	Percent
1983	4.84
1984	2.64
1993	0.97
1994	1.36
1995	0.91
1996	4.59
1997	2
1998	1.86
1999	3.19
2000	4.56
2001	2.82
2002	3.57
2003	3.09
2004	3.77
2005	3.69
2006	4.56
2007	3.55
2008	5.4
2009	5.66
2010	3.01
2011	2.81
2012	2.44
2013	2.17
2014	3.06
2015	2.81
2016	2.61
2017	2.67
2018	2.35
2019	2.67
2020	4.45