Year	Percent
1991	0.98
1992	1.02
1993	1.26
1994	1.95
1995	3.85
1996	2.43
1997	1.44
1998	1.14
1999	0.93
2000	1.38
2001	1.24
2002	1.24
2003	1.49
2004	1.69
2005	1.91
2006	1.81
2007	1.9
2008	2.1
2009	2.96
2010	3.08
2011	2.83
2012	2.77
2013	2.68
2014	2.6
2015	2.4
2016	2.04
2017	1.9
2018	1.65
2019	1.86
2020	2.48