Year	Percent
1990	1.57794
1991	1.51024
1992	1.34381
1993	1.28774
1994	1.23396
1995	1.83954
1996	1.91034
1997	1.91022
1998	1.82883
1999	1.66298
2000	1.6828
2001	1.44355
2002	1.47038
2003	1.34455
2004	1.15431
2005	1.11944
2006	1.33558
2007	1.28218
2008	1.22088
2009	1.20615
2010	1.18117
2011	1.17483
2012	1.1622
2013	1.15536
2014	0.94704
2015	0.94673
2016	0.93702
2017	0.89996
2018	0.87632
2019	0.8528
2020	0.93876