Year	Percent
1985	1.64
1986	1.69
1987	0.7
1988	0.28
1992	0.73
1993	1.18
1994	1.45
1995	1.41
1996	0.43
1997	0.48
1998	0.96
2001	1.43
2002	3.3
2003	2.12
2004	2.96
2005	1.32
2009	1.52
2010	1.35
2011	1.06
2012	0.76
2013	1.38
2014	2.5
2015	1.8
2016	1.91
2017	1.86
2018	1.47
2019	1.51
2020	3.62