Year	Percent
1990	1.86131
1991	1.77594
1992	1.67091
1993	1.42506
1994	2.55199
1995	2.16849
1996	2.16633
1997	2.06926
1998	1.84443
1999	1.75201
2000	1.72948
2001	1.68691
2002	1.66055
2003	1.70148
2004	1.6793
2005	1.7018
2006	1.65448
2007	1.6443
2008	1.64386
2009	1.65826
2010	1.64494
2011	1.66336
2012	1.67683
2013	1.50969
2014	1.4928
2015	1.41429
2016	1.43618
2017	0.99486
2018	0.99668
2019	0.98783
2020	1.00652