Year	Percent
1990	1.11
1991	1.06
1992	1.3
1993	1.33
1994	1.36
1995	1.5
1996	1.49
1997	1.19
1998	0.96
1999	1.93
2000	1.58
2001	1.32
2002	1.22
2003	1.59
2004	1.27
2005	2.03
2006	1.74
2007	1.79
2008	1.79
2009	1.71
2010	2.05
2011	2.05
2012	2.34
2013	2.33
2014	2.3
2015	2.57
2016	2.25
2017	2.52
2018	2.73
2019	2.96