Year	Percent
1991	0.78
1992	1.04
1993	1.38
1994	1.45
1995	1.8
1996	1.11
1997	1.35
1998	1.5
1999	0.65
2000	0.66
2001	0.58
2002	0.67
2003	0.67
2004	0.9
2005	1.1
2006	1.1
2007	1.09
2008	1.2
2009	1.48
2010	1.57
2011	1.59
2012	1.5
2013	1.55
2014	1.34
2015	1.15
2016	0.98
2017	0.99
2018	0.93
2019	0.93
2020	1.65